Any - Who's had their DPF removed? - balleballe

I'm interested in hearing in those who have had their DPF removed. Most companies also offer/perform a remap at the same time

Was the performance increased?

Was the economy increased?

Have you encountered any problems (ecu not reprogrammed correctly etc..?)

I'm giving serious consideration to buying an 06-07 plate mazda 6 2.0D and having the DPF removed as from my research this is the main problem area with this car/engine.

I am aware of possible MOT complications in the future and after talking to a few places they tell me I can fit the 'original' pipe (containing DPF) before the MOT then remove is straight after without much difficulty.

Top Reply

Any - Who's had their DPF removed? - TomoFife

Im not an expert here on these matters but from what I gather from endless googling is that:

* Removing the dpf will pass the MOT visual check as its not a catalytic converter.

* 99% of cars that have their dpf removed will PASS the emissions test

* You should really tell your insurance as many of the remaps to delete the DPF from the ECU will increase performance too.

The dpf collects soot, especially on start up, where traditionally diesel engines can kick out a fair bit. Once it gets to a certain % full and if the conditions are right, the engine performs a regeneration, to 'empty' the dpf. Where do we think that the gunk from the dpf goes when it regens? Yep, out into the atmosphere, the same place as it would of gone with no dpf.

Regarding people shouldnt buy a diesel if they aint going to do the miles or drive it in a certain way.... dpf issues are affecting many many types of car/driving type. Yes, those that pootle around town will probably have more issues, but even high mileage/motorway users are experiencing issues.

Most of the diesel engines in cars made in the last few years are made to be efficient and clean anyway. Its not the dpf itself that makes it clean, the dpf makes it slightly more cleaner.

All fuels that come from fossils will be bad for the enviroment. These fuels are also a finite resource. Driving a diesel that uses LESS of this resource may well be better for the planet and us inhabitants long term. Plus, if everyone stopped driving diesel, then the price of petrol would probably increase to cover the loss of sales. How so you ask? 1 Barrel of crude oil will produce x amout of petrol and x amount of diesel, they come from the same barrel. Take away most of the diesel production from that barrel and then the costs of refining that crude oil have to come from somewhere else... ie those that buy the petrol.

All Replies

Any - Who's had their DPF removed? - daveyK_UK

The removal is easy enough, but some manufactures have less problems with their DMFs than others. It also differs on the same model depending on the engine.

Any - Who's had their DPF removed? - bathtub tom

Do a search for 'Med' here.

Personally, I wouldn't touch a Mazda 6 diesel with a bargepole!

If the DPF's removed, then the ECU needs re-programming to mis-inform it. What happens if the MOT's tightened to require a DPF?

Any - Who's had their DPF removed? - The Moo

Presumably to keep insurance valid, the modification would need to be declared and if there is a performance increase, there migh be a premium hike...........

Any - Who's had their DPF removed? - Dovile

my father's 2008/58 mondeo estate titanium x (2.2 engine i think it is) has had dpf removed few months ago,after many a problem with it.

cost a few hundred pounds.....economy improves for him by 2-3mpg, but do not know about any other performance difference, other than not experiencing 'limp home' mode again since the removal.

Any - Who's had their DPF removed? - balleballe

my father's 2008/58 mondeo estate titanium x (2.2 engine i think it is) has had dpf removed few months ago,after many a problem with it.

cost a few hundred pounds.....economy improves for him by 2-3mpg, but do not know about any other performance difference, other than not experiencing 'limp home' mode again since the removal.

Cheers, thanks for the info
Any - Who's had their DPF removed? - bazza

Why not just buy something without a DPF in the first place? For example a 1.9 TDI VAG engined car - I,m pretty sure these are Euro iv and haven't got a DPF. Not completely sure about the 2.0 tdi but there seem to be more problems with that motor.

Or do you really need the diesel? What about a petrol Mazda6 and avoid the whole issue of DPF failure, engine oil dilution, etc and then possible MOT problems with the removal of it?

I would explore other options, it sounds like grief and hassle to me!!!

Any - Who's had their DPF removed? - PeterPeter

Hello

As I stated in another topic I have had my dpf removed on my mazda 6 2008 by www.pandpauto.eu No problem sonce- better fuel economy , no lights on , no regenerations- no problems.

Any - Who's had their DPF removed? - Avant

HJ posted the following on the current Mazda thread which may be useful here:

If you have a DPF removed, the car will then fail its next MoT. Under the new rules from January, catalytic converters and DPFs must remain in place and must remain working.

Any - Who's had their DPF removed? - rebel

"If you have a DPF removed, the car will then fail its next MoT. Under the new rules from January, catalytic converters and DPFs must remain in place and must remain working."

This is not correct, (and VOSA have confirmed as such)

As it stands, the new rules call for a check for the presence of the cat (with resultant fail if missing) where a catalyst emissions test is required.

Diesel engines do NOT have a catalyst emissions test, so this rule has no relevance.

Must bear in mind that rules could change in the future though.


Any - Who's had their DPF removed? - Avant

This is from the VOSA website. It looks as if, although diesels may not have a catalyst emissions test, they might fail the overall emissions test if they don't have a DPF.

I'm no engineer but I would imagine that this is more of a problem for well-worn engines.

Perhaps someone with more technical knowledge can clear this up for us.

Section 7.1 – Exhaust system

The major change in this section is that a catalytic converter missing becomes a reason for rejection. This is likely to be a major factor for some vehicles first used before August 1995 that only require a non-cat emissions test, but were originally fitted with a catalyst.

Section 7.4 – Exhaust emissions – compression ignition

The new smoke limit of 1.5m-1, implemented from 1 July 2011, has been documented in the new manual pages. Remember that this limit applies to both turbocharged and naturally aspirated compression ignition engines in vehicles first used on or after 1 July 2008.

Any - Who's had their DPF removed? - unthrottled

Diesel engines have a laughably easy opacity test-and that is it. There is no test for catalytic efficiency.

The hardest part of the diesel test is the fact that the engine is taken up to its maximum governed speed-so you must ensure that the cam belt is in good shape!

There will be a quick visual inspection of the exhaust system to check the components that should be there are there. But DPF removal usually involves gutting the box, rather than removing it entirely.

Any - Who's had their DPF removed? - UK_carholder_seller

I have a mazda 6 2006. I had problem with diesel dpf and two garages tried dpf delete but do not face the ecu remap. I was sent to www.pandpauto.eu Thay have upgrade with the emulator and the car has drive without problems.

I had MOT done las week and go through like a charm. NO PROBLEMS ATA ALL!!!!

THANK YOU P&P

Any - Who's had their DPF removed? - horv

quite a lot of solutions out there, just buyer beware, the software can only be removed if everything is working on the car eg all sensors, pressure sensors, o2 etc and certain things need to be reset, they will get you in take your money and say it wants something, i dealt with www.remap24.co.uk stay away from this guy, butchered my loom which his website says his emulator is plug and play, clearly not, and he clearly makes this item himself allbeit very poorly and after spending quite a few pounds i came to the conclusion, if you can take your car and let the garage assess it and give you a guarantee that their remedy will work otherwise you dont pay a bean, then that will be good, but there is ALLWAYS something else with these cars, stay away from the emulators, because if a problem arises nobody can fix it, best solution fix the car with all original parts is probably in my opinion the best ot just trade it in for something else. Only let the chancers fix if they will take payment after a test drive and thats if you want to let them loose on it, you have been warned.

Mot will be fine for a few years, not sure how they will test a dpf anyway.

Any - Who's had their DPF removed? - mazdaowner

My DPF was blocked recently, I had it regenned via Diagnostic, good for 2 weeks in the end I decided to risk and have the DPF removed .I've had a good experiences with remap24 and emulator, 30000 miles with no problems.

Any - Who's had their DPF removed? - Ben 10
What did your insurance company say when you told them you had a standard part removed?
Any - Who's had their DPF removed? - unthrottled

Probably nothing since you're not removing the DPF, simply gutting it and programming out any regen schedules/pressure drop data. It's illegal, and DPFs do remove about 90% of soot-so are you increasing particulate matter emissions by a large amount. But realistically, it won't be detected during the MOT.

Driven properly, they generally work quite well-even in mazda 2.0L engines. DPF problems are a sign of having bought an engine that's too big for your needs.

Any - Who's had their DPF removed? - ChannelZ

It's illegal,

False.

I await your evidence to say it is.

Any - Who's had their DPF removed? - unthrottled

Reasons for refusal of MOT certificate

-From the MOT testers' manual

-sub section Exhaust systems

"3. A catalytic converter missing where one was fitted as standard"

A DPF is technically a catalytic converter since oxidation of accumulated soot takes place in a trap coated with a catalyst. DPFs are also often integrated with the oxidation catalyst which is situated upstream of the trap.

In practice it is a moot point, since as long as the smoke test is passed then the MOT tester is happy. But technically, it is illegal-and it does increase your soot emissions by a factor of 10. That may bother some people.

Any - Who's had their DPF removed? - SteveLee

. DPF problems are a sign of having bought an engine that's too big for your needs.

So low mileage drivers aren't allowed to enjoy a high performance engine? A really really powerful petrol engine would be perfectly happy pottering about town - the actual problem is you bought a diesel.

Any - Who's had their DPF removed? - ChannelZ
What did your insurance company say when you told them you had a standard part removed?

Do you ring your insurance when a mudflap falls off? Or a wheeltrim? No? Why would you call them about a DPF?

Any - Who's had their DPF removed? - MikeTorque

Under Regulation 61A of the Road Vehicles (Construction and Use) Regulations 1986, it is an offence to use a car on the road that has been modified and, as a result of the modification, does not meet the emissions requirement that applied to it when new. This is the case if a diesel particulate filter is removed.

VOSO carry out many spot checks on vehicles and any found not complying with the above are done.

In addition the removal of a DPF is classified as a modification (and illegal) and as such a motor insurance policy will become void.

Companies offering DPF removal are making false claims and should be avoided at all costs.

Edited by MikeTorque on 27/04/2012 at 23:28

Any - Who's had their DPF removed? - unthrottled

Mike,

I'm not in any way supporting dPF delete but I think you're ever-egging the pudding.

In addition the removal of a DPF is classified as a modification (and illegal) and as such a motor insurance policy will become void.

Contrary to popular belief, the 3rd party aspect of motor insurance cannot be 'voided', and even the comprehensive aspect has safeguards. DPF doesn't affect the safety or the performance of the vehicle so it's not really an insurance matter.

t is an offence to use a car on the road that has been modified and, as a result of the modification, does not meet the emissions requirement that applied to it when new. This is the case if a diesel particulate filter is removed.

The problem is that DPF delete vehicles do pass the MOT emissions test. This doesn't mean they are emissions compliant, merely that the free revving smoke opacity test is a complete waste of time.

I'm on your side by the way. If DPF are required to be fitted by law, then VOSA should enforce compliance. It makes a mockery of the system if aquiescence is optional. VOSA are behind the curve. They need to scrap the free revving smoke test and subject diesel engines to an exhaust gas analyser-just like spark ignition engines have to. All the test equipment required is already in place.

Any - Who's had their DPF removed? - Ben 10

Mazdaowner hasn't answered my question.

But he has removed the DPF fitted at factory on a car that might fail an MOT, might be uninsured in terms of his policy and this will not show up on any ANPR. Though I hope he has checked with his insurance company as I would hate to think that having a biff might leave him more out of pocket than simply driving with a DPF. Insurance companies are very good at wriggling out of paying out.

My Focus 1.8 doesn't have a DPF, and reading the horror stories around, I'm glad it hasn't. I will not be buying a new generation diesel after this one, and I think many maufacturers will have many in stock now that the diesel ownership bubble has burst. Why sell something that costs more to buy, more to fuel and more to maintain. They better start switching production back to petrol versions and quickly.

Any - Who's had their DPF removed? - unthrottled

But he has removed the DPF fitted at factory on a car that might fail an MOT, might be uninsured in terms of his policy and this will not show up on any ANPR

But it has passed the MOT! The insurance company look for things that affect the road worthiness of the vehicle-or its potential risk such as performance modifications.

Technically any non OEM approved part is a modification. Would one lose their coverage because they used a GSF air filter?!

Why sell something that costs more to buy, more to fuel and more to maintain. They better start switching production back to petrol versions and quickly.

The only people that have trouble with DPFs are mimsers that buy a car with a big engine to show off, then pootle along trying to save diesel oblivious to the fact that the ECU is frantically spraying diesel into the exhaust because they're pootling along. If the stopped mimsing the problem would go away. Trucks don't even bother with active regens because the the operators buy an engine that fits that actual needs, not their aspirations.

Diesels are less atractive for running around in than they used to be, but their economy is still significantly better than petrol. You don't see many trains, trucks or ships with spark plugs. It's horses for courses.

Relax. Just drive!

Any - Who's had their DPF removed? - MikeTorque

>> In addition the removal of a DPF is classified as a modification (and illegal) and
>> as such a motor insurance policy will become void.

Just to clarify :

If a DPF is removed from a Focus 1.6 TDCi an electronic remap is required, this coupled with the removal, disabling or modification of a DPF is sufficient to void the insurance cover as per a motor insurance policy terms & conditions.

For example :
It is most important that you tell us as quickly as possible of any changes that occur since the insurance started or since the last renewal date. If you do not it is possible that a claim will not be covered.

.Change to the vehicle itself such as fitting alloy wheels, bodywork alterations or engine modications.


unthrottled, you are spot on with what you said "They need to scrap the free revving smoke test and subject diesel engines to an exhaust gas analyser-just like spark ignition engines have to. All the test equipment required is already in place."

In addition the above tests should be extended to include vehicles less than 3 years old with the tests carried out as part of a scheduled routine service.

This would help eliminate the confusion that surrounds such matters and bring about consistency in how exhaust emissions are tested for petrol & diesel vehicles alike.

Edited by MikeTorque on 28/04/2012 at 22:59

Any - Who's had their DPF removed? - Mark-UK

Hi folks,

I have had mine DPF removed by London Remaps. They have also remapped my BMW 320d from 163HP to 190HP. Massive difference.
Remapped was included in price. Entire job only took them 3 hours to complete.

(Link removed - we can't allow free advertising.)

Edited by Avant on 19/10/2012 at 23:36

Any - Who's had their DPF removed? - Collos25

Blatant advertising and I hope you have informed your insurance company.

Any - Who's had their DPF removed? - madf

I hope all those who remove DPFs are fined , cars siezed and crushed and licenses endorsed.

They deserve it for deliberate pollution.

Any - Who's had their DPF removed? - Collos25

Agreed how right you are.I believe the next tranche of regulations from the EU will test for increase in bhp and DPF removal failure to comply will be a failure easy to test but not easy to retrofit.The companies that removed the DPF will have another good business refitting them.

Edited by Collos25 on 19/10/2012 at 17:48

Any - Who's had their DPF removed? - Ben 10

Is it also an MOT failure if a car was factory fitted with one and is then presented without one?

I feel sorry for the person that unknowingly buys a DPF removed vehicle privately or from auction, then takes for MOT and finds it fails and then has to pay to have one refitted and the engine remapped.

Any - Who's had their DPF removed? - SteveLee

I hope all those who remove DPFs are fined , cars siezed and crushed and licenses endorsed.

They deserve it for deliberate pollution.

I agree, performance tuning your car for more power at the expense of more plant food from the exhaust pipe and a bigger dent in the wallet at the pumps is your own business, But soot from the now ubiquitous diesel engine is the cause of exploding asthma rates amongst city-dwelling children, DPFs are there for a b***** good reason.

.

Any - Who's had their DPF removed? - focussed

Contrary to popular/bar room/urban myth, it is impossible since 2009 for any insurance company to renege on the third party aspect of an insurance contract on a motor vehicle taken out and paid for within the eu.

That is eu insurance law and it applies throughout europe-the insurance company doesn't want you to know that because they want to sell you "european cover" or what ever.

Any - Who's had their DPF removed? - RT

Do you ring your insurance when a mudflap falls off? Or a wheeltrim? No? Why would you call them about a DPF?

Mudflaps and wheeltrims don't affect performance, well no more than marginally - removing the DPF fundamentally alters the breathing of the engine and the associated remap certainly counts as a modification.

Any - Who's had their DPF removed? - Jkardle
Had similar experience with remap24 called him back when dpf light come on and he said not his problem. Then went to his "friend" David in Reading who looked at the car and said that remap24 (Tom) is always doing bad jobs and that he is always having to fix his work. He said it will cost me £600 to fix it!!

In the end i got the damages repaired for £395.
Any - Who's had their DPF removed? - Avant

The simplest answer remains: if you do the sort of driving that would clog up a DPF, don't buy a diesel.

Out of interest, does anyone know whether the engines of buses and London taxis have DPFs? I would imagine that either they don't have them, or they are big enough not to get clogged.

Edited by Avant on 03/12/2012 at 00:47

Any - Who's had their DPF removed? - MikeTorque

The newer Buses & Taxis have to be fitted with a DPF.

Over 4000 premature deaths in 2008 in London were attributed to poor air quality, details here : http://www.london.gov.uk/sites/default/files/6830-1.pdf

The route to cleaner buses :
http://www.cleanaccessibletransport.com/Revised/Reports%20for%20publication/CleanBusGuide.pdf

Any - Who's had their DPF removed? - gordonbennet

I can't get understand some people, why this must have Diesel syndrome.

If you don't do the type of running that suits a Diesel and few private motorists do, then for goodness sake buy a petrol or hybrid, it shouldn't be this difficult running a car.

If you want reasonable performance and a real auto buy a bigger engined older petrol for peanuts and get it LPG converted.

Getting away from tractor engines, both the noise and the stink is almost liberating.

Any - Who's had their DPF removed? - Hamsafar

I had mine removed from my A8.

They were only fitted to the A8Long (EU4), the A8 (EU4) standard wheelbase did not have one in 2006.

It was removed from the exhaust system, hollowed out with a crowbar rammed into it's inlet and outlet, and refitted.

The ECU was reflashed with software that did not monitor or care about DPF related matters. I got the same mpg, better acceleration (which was flagging) and no more noise.
The ECU flash was probably a remap for more peformance.

The inurance company's and it's crusaders' opinions are not interesting to me.

Edited by Hamsafar on 21/10/2012 at 21:28

Any - Who's had their DPF removed? - MikeTorque

You just admitted to driving a car without insurance and an MOT failure. Hope you get caught real soon and are banned for a very long time, the roads will be a safer place without you on them.

Any - Who's had their DPF removed? - Hamsafar

If you are going to make an egregious statement, then you will have to qualify it.

Any - Who's had their DPF removed? - thunderbird

To those who think that removing their DPF is such a good idea they should stand their children and grandchildren bedind the car in the fumes.

They are fitted for a reason, would you remove the airbags and seatbelts if they gave you problems and you thought the MOT man would not notice.

Any - Who's had their DPF removed? - yorkyred

You just admitted to driving a car without insurance and an MOT failure. Hope you get caught real soon and are banned for a very long time, the roads will be a safer place without you on them.

My god there is some ill informed rubbish on this thread. I'm about to have mine removed after nightmare issues and have informed my insurance company who are one of the biggest in the country. There are no issues insurance wise as its NOT classed as a modification as far as they are concerned, its also not going to be failing any MOT as is still well within omission standards. Please show me where you sourced your information from before making the above scandalous statements.?
Any - Who's had their DPF removed? - specialist

I'm interested in hearing in those who have had their DPF removed. Most companies also offer/perform a remap at the same time

Was the performance increased?

Was the economy increased?

Have you encountered any problems (ecu not reprogrammed correctly etc..?)

I'm giving serious consideration to buying an 06-07 plate mazda 6 2.0D and having the DPF removed as from my research this is the main problem area with this car/engine.

I am aware of possible MOT complications in the future and after talking to a few places they tell me I can fit the 'original' pipe (containing DPF) before the MOT then remove is straight after without much difficulty.----------STAY AWAY FROM DIESELS.GET YOURSELF PETROL AUDI

Any - Who's had their DPF removed? - PeterPeter

I have had my dpf removed and engine ecu remaped almost year ago, Better fuel economy , more power and torque - no more problems with dpf and no more worries about raising oil level.

They done it many thanks

http://www.youtube.com/watch?v=OLG1S1syfDY

Any - Who's had their DPF removed? - Collos25

So your immisions do not comply and therefore you are committing an offence using the vehicle, have you informed your insurance company of your stupidity if you are not happy with a car with a DPF why buy one.

Any - Who's had their DPF removed? - balleballe

So your immisions do not comply and therefore you are committing an offence using the vehicle, have you informed your insurance company of your stupidity if you are not happy with a car with a DPF why buy one.

Because they are fitted as standard on any decent size Diesel

I drive a petrol and do 25k miles a year.

I want to drive a car with a turbo as I much prefer the drive

A turbo on a petrol makes it much less economical

A turbo on a diesel doesnt effect economy much

I was considering the mazda 6, which has the DPF issue even if mostly motorway miles.

The German makes are either unreliable or not convenient (RWD)

Any suggestions?

Any - Who's had their DPF removed? - thunderbird

They done it many thanks

A brilliant command of the English language as well as law breaker.

Any - Who's had their DPF removed? - gtamax

Basicly all ford parts on the volvo generic DPF

yes have fix for same see these videos

very informative material was found here on a fix i believe it can also be used on Peugeot ford etc etc with some variations to parameters but basically the same procedure.

DPF FIX PART 1 www.youtube.com/watch?v=QMf4m946aKA

DPF FIX PART 2 www.youtube.com/watch?v=TXLZEG6It8o

Any - Who's had their DPF removed? - Avant

There is clearly room for debate on whether removing a DPF causes issues regarding insurance, legality and MoT. This debate needs to be conducted politely.

What is less debatable is that:

- removing a DPF increases the pollution produced by the car in question; and

- if your motoring is mainly in town or short journeys, DON'T BUY A DIESEL. There are far more efficient, torquey petrol engines around than there used to be, and these will do this sort of job almost as economically and without the DPF issue.

Any - Who's had their DPF removed? - Collos25

A law abbiding web site should not be discussing an illegal act.

Any - Who's had their DPF removed? - daveyK_UK

Removing a DPF is not illegal.

Its worth mentioning, Renault are leading the game in terms of DPF performance and durability, if you must have diesel for low mileage then choose a Renault or Dacia.

Do not expect the same DPF reliability from a Nissan with the same 1.5 diesel engine, Nissan engineers still have not got their head around it.

I swore after the shambles that was a 2003 laguna and my firends 2005 Megane, I would never buy a renault.

And I have it on god authority, the Dacia Duster DPF andengine filters are designed to last by Renault. I presume this will be the same for the Sandero and Sandero stepaway.

Hoewever, it does seem, on the DPF front, they lead the game.

Any - Who's had their DPF removed? - Collos25

Removing the DPF is not strictly illegal but not getting a new log book is and so is not informing the insurance company,It also alters the road tax class so if you remove the DPF and do not do all the relevant paper work then it becomes an illegal vehiDon,t forget you could infact loose the vehicle as punishment as it will not be legally on the road .

Any - Who's had their DPF removed? - gordonbennet
And I have it on god authority,

How do you find the time between all those crowd blessings and other Vatican business to conduct..:-)

Any - Who's had their DPF removed? - unthrottled

Removing a DPF is not illegal.

Then why do Manufacturers spend good money fitting an apparently useless component that does not help with performance or economy??

Emissions regulations set a standard but do not stipulate how that standard is achieved-therefore there is no specific mention of DPF or 3 way catalytic convertors in the MOT guidelines. This gives rise to the misconception that DPF is voluntary. It isn't. DPF reduces particulate emissions by nearly two orders of magnitude. The diesel MOT test is very rudimentary and cannot measure particulate emissions. So you'll probably get away with it .

And I have it on god authority, the Dacia Duster DPF andengine filters are designed to last by Renault.

Like turbos, and fuel injection systems, DPFs are not designed in-house by renault, but are bought in from external companies

Of course the skilll ies in how the Renault engineers calibrate the combined system for their needs.

Any - Who's had their DPF removed? - RT

Removing a DPF is not illegal.

Then why do Manufacturers spend good money fitting an apparently useless component that does not help with performance or economy??

Emissions regulations set a standard but do not stipulate how that standard is achieved-therefore there is no specific mention of DPF or 3 way catalytic convertors in the MOT guidelines. This gives rise to the misconception that DPF is voluntary. It isn't. DPF reduces particulate emissions by nearly two orders of magnitude. The diesel MOT test is very rudimentary and cannot measure particulate emissions. So you'll probably get away with it .

And I have it on god authority, the Dacia Duster DPF andengine filters are designed to last by Renault.

Like turbos, and fuel injection systems, DPFs are not designed in-house by renault, but are bought in from external companies

Of course the skilll ies in how the Renault engineers calibrate the combined system for their needs.

Cars are required to meet a specific standard when new - the law doesn't impose that standard for the car's entire life - in use, it's the C&U regulations and MoT regulations that regulate what can or can't be done.

I don't agree with removing DPFs but that doesn't make it illegal even if that's what we wish.

Edited by RT on 04/12/2012 at 13:23

Any - Who's had their DPF removed? - unthrottled

Cars are required to meet a specific standard when new - the law doesn't impose that standard for the car's entire life - in use

Not true. Manufacturers have to demonstrate long term compliance of their vehicles. That's why the ZDDP additive in oil has been reduced-it reduced long term cataytic converter effectiveness. The decision to reduce ZDDP is not one to be taken lightly because it is a superb Extreme Pressure lubricant.

The MoT protocol is largely a matter of convenience. Clearly it is impractocal to subject each car to a full New European Drive cycle every year.

Any - Who's had their DPF removed? - daveyK_UK

so we are agreed, the act of removing it is not illegal.

Any - Who's had their DPF removed? - unthrottled

Thre act of removing it isn't illegal-driving on a public road with it removed is. If DPF was optional, why won't dealers remove your DPF for you...?

Any - Who's had their DPF removed? - daveyK_UK

So a farmer who buys a diesel 4x4 for us on private roads, who has SORN it, is allowed to remove it?

If its insured, he will have to tell his insurance?

Any - Who's had their DPF removed? - unthrottled

Perfectly legal. Off road vehicles aren't subject to road vehicle emissions control. Can't see there being an insurance issue since the insurance risk factor hasn't changed.

Any - Who's had their DPF removed? - daveyK_UK

i know a bloke who has had it removed from his mondeo 2.2 diesel, he is now getting better mpg.

less fuel usage vs a little ounce of soot

what is really better for the environment?

Any - Who's had their DPF removed? - unthrottled

Yes mileage will improve without the DPF. A 5-10% increase in consumption vs >95% reduction in soot? Depends on your view of air quality I suppose.

Similar sentiments were expressed when catalytic converters killed off lean burn petrol engines. But the >90% reduction in CO, HC and NOx was just too compelling from an air quality perspective.

DPFs are like affordable housing developments, a wonderful idea-in someone else's backyard!

Any - Who's had their DPF removed? - John F

Yes mileage will improve without the DPF. A 5-10% increase in consumption vs >95% reduction in soot? Depends on your view of air quality I suppose.

Which is best for the world in general and us in particular? [no pun intended], the unburnt carbon in the form of soot, or the burned carbon in the form of CO2? I presume the motor industry prefers the latter.

Any - Who's had their DPF removed? - RT

CO2 just warms us up a bit - soot kills us.

Any - Who's had their DPF removed? - unthrottled

The world probably doesn't really care about a bit of soot. The exception being ice covered regions. Ice has a high albedo ie it reflects most of the incident sunlight. Soot is a strong absorber of sunlight. So if soot settles on ice, it will increase the rate of melting.

As for us? Soot is only really a problem in large urban areas where the concentration of traffic is high. Do we need technical solutions, or should people with a sensitive disposition not live in the metropolis?! I must admit that I favour the latter...

Any - Who's had their DPF removed? - RT

I can't imagine why ANYONE lives in a metropolis by choice but most simply don't have any choice, economically.

Any - Who's had their DPF removed? - John F

I would happily retire to London if property wasn't so ridiculously expensive - there are so many amusements. I would hate to work or drive there, though. There is such vicarious pleasure in using my bus pass, and nowadays the air is so clean. So DPFs get my vote.

Any - Who's had their DPF removed? - vas786

i had my dpf removed on my mazda 6 55 plate it was a nightmare problem

company called xxxx in london did the job

more info on their website (deleted)

Edited by Avant on 30/12/2012 at 22:19

Any - Who's had their DPF removed? - Collos25

Again advert, one thing removing the DPF on a Mazda 6 is very simple.

Any - Who's had their DPF removed? - TomoFife

Im not an expert here on these matters but from what I gather from endless googling is that:

* Removing the dpf will pass the MOT visual check as its not a catalytic converter.

* 99% of cars that have their dpf removed will PASS the emissions test

* You should really tell your insurance as many of the remaps to delete the DPF from the ECU will increase performance too.

The dpf collects soot, especially on start up, where traditionally diesel engines can kick out a fair bit. Once it gets to a certain % full and if the conditions are right, the engine performs a regeneration, to 'empty' the dpf. Where do we think that the gunk from the dpf goes when it regens? Yep, out into the atmosphere, the same place as it would of gone with no dpf.

Regarding people shouldnt buy a diesel if they aint going to do the miles or drive it in a certain way.... dpf issues are affecting many many types of car/driving type. Yes, those that pootle around town will probably have more issues, but even high mileage/motorway users are experiencing issues.

Most of the diesel engines in cars made in the last few years are made to be efficient and clean anyway. Its not the dpf itself that makes it clean, the dpf makes it slightly more cleaner.

All fuels that come from fossils will be bad for the enviroment. These fuels are also a finite resource. Driving a diesel that uses LESS of this resource may well be better for the planet and us inhabitants long term. Plus, if everyone stopped driving diesel, then the price of petrol would probably increase to cover the loss of sales. How so you ask? 1 Barrel of crude oil will produce x amout of petrol and x amount of diesel, they come from the same barrel. Take away most of the diesel production from that barrel and then the costs of refining that crude oil have to come from somewhere else... ie those that buy the petrol.

Any - Who's had their DPF removed? - unthrottled

yep, out into the atmosphere, the same place as it would of gone with no dpf.

No, it doesn't. It oxidises the accumulated soot to carbon dioxide and water vapour. Otherwise the device wouldn't do much good, would it?

I don't wish to sound condescending, but if you don't understand sub-GCSE level chemistry, I wouldn't bother trying tio improve the mechanics of your car.

Any - Who's had their DPF removed? - Collos25

Well said .

Any - Who's had their DPF removed? - carlos w

I've got a 72k mile 2.2td Mazda 6!

I can tell when the dpf regenerates and a good load of right foot usually helps!

Its currently doing 60mpg on a run!

I love the car and I'd buy another one!

Any - Who's had their DPF removed? - balleballe

Nice car - keep an eye on the timing chain though

Any - Who's had their DPF removed? - carlos w

Nice car - keep an eye on the timing chain though

Mazda have already replaced it under warranty!

If you're driving a diesel you need to be doing journeys of over 15 miles, and you need to use the turbo for good 2-3 minute periods at a time, this allows the dpf to get hot and the carbon deposits to burn.

This saves fuel as it stops the ecu dumping fuel into the dpf to raise its temperature and burn the carbon!

Hopefully this technology will improve and people will have less issues with these in the future!

Any - Who's had their DPF removed? - Mark-UK

You do know that your local remapper will remove the DPF and map out the DPF functions on the ECU for around 400? Best solution for anyone with DPF issues.

My local folks (London Remaps) are doing the service for the 2.0D Mazda 6 and other cars for £400. They remove the DPF pipe, knock the guts out of it, refit, then map out all the DPF functions. They'll also add an extra 30bhp if you want while they're at it for no exra charge.

But the cheapest way of sorting the DPF problem is to:

1. Remove the dpf pipe yourselves
2. Purchase a large bore drill (300mm long)
3. Drill out the DPF filter (minimum 100mm in diameter diameter)
4. Refit dpf pipe
5. Get someone to map it - costs about £250.

Any - Who's had their DPF removed? - daveyK_UK

excellent idea.

That way it would never be picked up by an MOT test centre, never picked up if it was a write off and the insurance was looking for a way out and not picked up by plod doing his road side DVLA check.

I will investigate.

Does Diesel bob do full removal or this type?

Any - Who's had their DPF removed? - Collos25

I notice the new parts of the MOT the inspector must look for all the parts of the DPF and check to see if it works this applies to cars were it was fitted as original equipment.Hope those who illegaly removed theirs have all the bits and the old program for the ECU.

Any - Who's had their DPF removed? - Hamsafar

Read the thread, people are only removing the internal filter medium, the MOT doesn't remove the DPF and look inside, the car will still pass the smoke test with flying colours as these are only fitted to EU4 & 5 engines in the first place. The MOT tester certainly doesn't trawl through ECU binary code.

Any - Who's had their DPF removed? - RT

Why are DPF's fitted? To reduce the small particles of soot that cause lung cancer.

Is it any wonder that governments and authorities are anti-motorist when some want to go back to the bad old days of lead poisoning and particle-ridden exhausts.

If you want to keep driving cars, you'll have to at least co-operate with those trying to make it tolerable.

Or are the DPF removers just as ostrich-like as the climate-change opposition ?

Edited by RT on 27/04/2013 at 20:34

Any - Who's had their DPF removed? - unthrottled

The MOT smoke test is a joke. Hard on engines and doesn't measure anything useful anyway. A better test would be to hold a filter paper over the exhaust tips for a specfied time, then perform an opacity test on the filter paper. DPF deletes wouldn't pass this and there would be no need for a pointless free revving test.

If you buy a car with an approporiate engine size for what you actually use, rather than what you think you use, you won't have a DPF problem anyway!

Any - Who's had their DPF removed? - Collos25

Most people remove the DPF and replace with a piece of tube a definite MOT failure as for keeping the DPF and removing the inside and altering the program in the ECU people who do this are firstly idiots and secondly taking a very great insurance risk and could be subject to the DVLA deregistering the car but please take the risk.

Edited by Collos25 on 27/04/2013 at 22:06

Any - Who's had their DPF removed? - RT

Most people remove the DPF and replace with a piece of tube a definite MOT failure as for keeping the DPF and removing the inside and altering the program in the ECU people who do this are firstly idiots and secondly taking a very great insurance risk and could be subject to the DVLA deregistering the car but please take the risk.

Balderdash - most people buy cars and don't modify them !!

Any - Who's had their DPF removed? - Collos25

I missed a word out the word "who" it read much better ,but you should have relised that you are so clever.

Any - Who's had their DPF removed? - Bycro
My last four diesel company cars have all had DPFs. I have never had a single problem. That said, most of my mileage is motorway, about 35,000 a year. I do know people who have had problems, but there mileage has been relatively low with lots of short journeys around town. I guess modern diesels aren't suited to this sort of ownership as I think Honest John has mentioned this too.

If I was doing mainly town and short start stop journeys I think I would only buy a petrol car.
Any - Who's had their DPF removed? - yorkyred

Most people remove the DPF and replace with a piece of tube a definite MOT failure as for keeping the DPF and removing the inside and altering the program in the ECU people who do this are firstly idiots and secondly taking a very great insurance risk and could be subject to the DVLA deregistering the car but please take the risk.

100% inaccurate. Please again give your source of information?
Any - Who's had their DPF removed? - yorkyred

Most people remove the DPF and replace with a piece of tube a definite MOT failure as for keeping the DPF and removing the inside and altering the program in the ECU people who do this are firstly idiots and secondly taking a very great insurance risk and could be subject to the DVLA deregistering the car but please take the risk.

100% inaccurate. Please again give your source of information?

To add to this my insurance company have been informed and its NOT classed as a modification and they are fine with it. My local garage who have MOT'd my cars for years state it won't fail an mot and have never heard of a single car failing that's had one removed. Some people don't like them removed, I understand that. But scandalous statements are been made with absolutely no informed proof being shown to back them up which is totally irresponsible.
Any - Who's had their DPF removed? - Hamsafar

Correct. They are not a legal requirement in the UK.
There are emmissions standards for new vehicles which may require a DPF to meet, but they only apply to cars at the point when they are sold as new, not thereafter. After that, only passing the annual smoke test is needed and EU3, EU4, EU5 and EU6 regime cars should have no problem with that.

Any - Who's had their DPF removed? - Collos25

I suggest you read the new MOT directive very carefully.

Any - Who's had their DPF removed? - yorkyred

I suggest you read the new MOT directive very carefully.

Please point out anything that's relevant. Frankly it would make a change from people making inaccurate statements simply because they don't like the idea of DPF removals. As I've stated there is still NO evidence of cars failing the test through DPF removals. I also have a C3 which is an 03 plate without a DPF, is that now going to fail ?
Any - Who's had their DPF removed? - thunderbird
I also have a C3 which is an 03 plate without a DPF, is that now going to fail ?

Daft and pointless comment. Since a 03 plate C3 would not have been fitted with a DPF (like many Euro 3 cars) it will never need a DPF. If you fitted one there would be no way to regenerate it etc since the ECU in the car would not know what a DPF was.

Any - Who's had their DPF removed? - yorkyred
I also have a C3 which is an 03 plate without a DPF, is that now going to fail ?

Daft and pointless comment. Since a 03 plate C3 would not have been fitted with a DPF (like many Euro 3 cars) it will never need a DPF. If you fitted one there would be no way to regenerate it etc since the ECU in the car would not know what a DPF was.

Exactly, I'm trying to make the point that this thread if full of daft comments not backed up by actual informed facts. Still waiting for one of these posters to back anything up they have stated such as deregulation, running illegal, failing mot, invalid insurance. Anyone can come up with crap they just made up in their bedroom. One of your own lines "A brilliant command of the English language as well as law breaker."

Edited by yorkyred on 04/05/2013 at 19:22

Any - Who's had their DPF removed? - yorkyred
I also have a C3 which is an 03 plate without a DPF, is that now going to fail ?

Daft and pointless comment. Since a 03 plate C3 would not have been fitted with a DPF (like many Euro 3 cars) it will never need a DPF. If you fitted one there would be no way to regenerate it etc since the ECU in the car would not know what a DPF was.

Exactly, I'm trying to make the point that this thread if full of daft comments not backed up by actual informed facts. Still waiting for one of these posters to back anything up they have stated such as deregulation, running illegal, failing mot, invalid insurance. Anyone can come up with crap they just made up in their bedroom. One of your own lines "A brilliant command of the English language as well as law breaker."

By the way Auto express had an article on this in the Feb 2013 edition, they approached Vosa who responded that there was no reason a car would fail an mot based on not having a DPF, it would only fail it did not meet omission standards. Just another actual fact.
Any - Who's had their DPF removed? - Avant

"Daft and pointless comment"

Thunderbird, you will please STOP making needless remarks like that. If you do it again I shall simply delete your whole post.

Any - Who's had their DPF removed? - thunderbird

"Daft and pointless comment"

Why was it daft and pointless. The OP's Citroen did not have a factory fit dpf thus why should there be any need to fit one to pass an MOT.

As I said a daft and poitless comment.

Any - Who's had their DPF removed? - yorkyred
I have already made it plain why I posted that line, still waiting for your evidence to back up your statement accusing another poster of being a " law breaker" or will you be making an apology?
Any - Who's had their DPF removed? - thunderbird
I have already made it plain why I posted that line, still waiting for your evidence to back up your statement accusing another poster of being a " law breaker" or will you be making an apology?

DPF's are fitted to cars for very good reasons. The soot articles are carcenogenic and I have no wish to inflict such sufferening on anyone by putting out emissions that can be removed. All Euro 5 diesels have to be fitted with a DPF by law, without one they cannot be type approved and registered. Some Euro 4 cars had to be fitted with a DPF to comply with the law, some did not, those that needed one could not be registered without one.

We have 2 diesel cars in the house with DPF's one is Euro 5, one is Euro 4. I will not be removing the DPF from either and risk other peoples health.

There may be a technicality that allows people to remove DPF's from cars and still pass their MOT and if that is a fact it needs sorting out. As I said above cars are fitted with them for good reasons and they should not be removed.

Would you remove the ABS and airbags form your car and still carry on driving? Providing you did not have the need to brake in an emergency or be invoved in an accident you would be fine but under emergency conditions I am sure you would wish you had them. If you suffered from lung problems you would not be so sure about removing the DPF.

I will not be apologising for calling anyone a lawbreaker since I feel they are breaking the law by removing the DPF.

Any - Who's had their DPF removed? - yorkyred
I have already made it plain why I posted that line, still waiting for your evidence to back up your statement accusing another poster of being a " law breaker" or will you be making an apology?

DPF's are fitted to cars for very good reasons. The soot articles are carcenogenic and I have no wish to inflict such sufferening on anyone by putting out emissions that can be removed. All Euro 5 diesels have to be fitted with a DPF by law, without one they cannot be type approved and registered. Some Euro 4 cars had to be fitted with a DPF to comply with the law, some did not, those that needed one could not be registered without one.

We have 2 diesel cars in the house with DPF's one is Euro 5, one is Euro 4. I will not be removing the DPF from either and risk other peoples health.

There may be a technicality that allows people to remove DPF's from cars and still pass their MOT and if that is a fact it needs sorting out. As I said above cars are fitted with them for good reasons and they should not be removed.

Would you remove the ABS and airbags form your car and still carry on driving? Providing you did not have the need to brake in an emergency or be invoved in an accident you would be fine but under emergency conditions I am sure you would wish you had them. If you suffered from lung problems you would not be so sure about removing the DPF.

I will not be apologising for calling anyone a lawbreaker since I feel they are breaking the law by removing the DPF.

Except they are not actually breaking the law, you just wish it was because you're on an anti pollution crusade. You can't just go making libellous statements against people just because you don't like the law as it stands. The issue is not about removing them its about something that's been added to cars that is badly designed and not fit for purpose and its going to be a bigger and bigger issue as cars get older and the cost of replacement is more than the car is actually worth. If my C3 had one it would be scrapped by now.
Any - Who's had their DPF removed? - Engineer Andy

I'll see if I can diffuse some of the anger that seems to be pervading this discussion (given I'm a "petrol" car only guy and an interested bystander) by injecting a bit of humour:-

Q. Who's had their DPF removed?

A. Not me - it wasn't offered on the NHS and I couldn't afford to go private. I'll have to suffer in silence in the meantime... :-)

Any - Who's had their DPF removed? - heavy right foot

I have found this late in proceedings, but, i am considereing running my diesel on bio refined by myself (to current regulation), which is not compatible with dpf so i would have it made redundant and the relevant remap done.

i would not then be worried about the pollution i cause as this will be negligable and well below that of any diesel or petrol car.

as clearly stated in previous comments these requirments for the manufacturers to fit dpf's relate to eu regulations which are not currently enforced or may never be, as clearly seen by current exhaust tests, the need to half do a job seems to be all that happens with these things.

and to add some good old fashioned fuel to the fire, i you live it a town or city and all you do is comute to work in the city or drive the kids to school in a 4X4 made for road use, then you should not own a diesel or any car for that matter, public transport is available, further investment in these services would come from increased usage and as such a better service would follow. i live in the contryside and i have an 8 mile drive to my nearest supermarket & petrol station and 3 miles to the village shop and post office.

anyway, just my two penith worth.

Any - Who's had their DPF removed? - madf

Anyone who buys a car and then objects to apart of the car should do some research before they buy.

Anyone who modifies a car by removing a part is obvioulsy an engineering genius achieving something multi million engineering budgets cannot do

:-)

I'll get my coat.

Any - Who's had their DPF removed? - bathtub tom

>>i would not then be worried about the pollution i cause as this will be negligable and well below that of any diesel or petrol car.

What about particulates?

Any - Who's had their DPF removed? - heavy right foot

100% biodiesel can have reductions of 40% of particulates, 65% reduction of hydrocarbons but a 10% increase of NOx.

Any - Who's had their DPF removed? - heavy right foot

suprisingly the americans seem to be far more ahead than us in the use of biodiesel.

but lets be clear, i dont mean straight vegi oil in your tank. i mean properly refined oil with all organic materials removed (animal fat can also be refined aswell)

Any - Who's had their DPF removed? - heavy right foot

some quick reading on bio usage.

http://biodieselmagazine.com/articles/1247/enhancing-the-burn/

quite interesting.

Any - Who's had their DPF removed? - RT

some quick reading on bio usage.

http://biodieselmagazine.com/articles/1247/enhancing-the-burn/

quite interesting.

That's a website promoting biodiesel - of course they think it's a good idea !!

Any - Who's had their DPF removed? - heavy right foot

some quick reading on bio usage.

http://biodieselmagazine.com/articles/1247/enhancing-the-burn/

quite interesting.

That's a website promoting biodiesel - of course they think it's a good idea !!

in the same way the majority of the car industry wont say its safe to use above20-30% bio because they dont want to upset the petrochemical companies.

who can blame them, the petrochemical industry is a multitrillon £/$ machine.

and look what happened to mr diesel ! ........

Any - Who's had their DPF removed? - RT

suprisingly the americans seem to be far more ahead than us in the use of biodiesel.

Are they?

They think diesels should only be in big trucks and aren't that happy about diesels in pickups

Generally they avoid ethanol fuel like the plague

Any - Who's had their DPF removed? - RT

The purpose of DPFs is to reduce particulates - these cause cancer, so I'm all for DPFs.

Any - Who's had their DPF removed? - heavy right foot

the use of a fuel with reduced particulates surely is better in the first place.

though reading the link, it would seem that dpf removal may not be required.

the more you look the more you find and the more you learn, the more you look.......

Any - Who's had their DPF removed? - heavy right foot

if you research biodiesel on the web most info regarding bio will be direct from america,

to say they think diesels are for trucks only is acurate for the most part. but the vehicle industry there has only produced lesser quality engines compared to european versions. with the performance differences between 25yr old petrol or diesels, i know i would prefer petrol.

if you beleaive some of what you read, the quality of american diesel has been poor at best.

Any - Who's had their DPF removed? - skidpan

Its not just the DPF that may be damaged, the fuel pump on most modern common rail diesels will not tollerate veggie diesel, it does not lubricate them sufficiently and they become damaged and can cost £1000's to replace.

If you own an old school diesel such as an old Peugeot or VW you should be fine, otherwise any cost saving will be lost when you have to replace epensive components.

Since you are talking about removing the DPF I conclude its a newish vehicle thus you are risking severe damage.

Any - Who's had their DPF removed? - heavy right foot

i have only foud reference to bio diesel (EN14214) having better lubricating properties than standard diesel.

but lots of references that fuel pumps still having rubber or nitrile seal which cant cope with bio fuel even though rubber should have been phased out years ago, this being the possible reason for b20 max for some manufacturers and b10 for others.

its a 2002 renault, the dpf is not like most i see on the internet, it is THE section of exhaust that runs under the car. so 1) manifold + egr. 2) cat converter. 3) flexi joint. 4) dpf. 5) rear section with single box (2'x4'x 5" approx) twin pipes behind nsr wheel.

been on parts site and checked part images, i have seen on you tube ect dpf being similar in size and shape to cat's, so is it really a dpf or an early attempt.

Any - Who's had their DPF removed? - heavy right foot

old skool diesel will run on almost anything, i used to know of a chap in the early 90's that used to run his vw golf pick up on a mix of kero and filtered used engine oil.

12ppl for kero and free old oil from local garages.

now THAT will screw up your pump for sure!!!

Any - Who's had their DPF removed? - unthrottled

There's no conspiracy against biodiesel. It's just not as flexible as petrodiesel.

As far as the soot reduction is concerned, this is solely due to the fact that biodiesel is an oxygenated fuel. Petrodiesel could easily be oxygenated by adding a heavy alcohol to achieve the same result. The reason this is not done is because the prescence of oxygen in the fuel can cause the fuel to be thermally unstable in high pressure/temperature fuel injection systems. That's when deposits start forming in the injectors. If deposits form in the injector nozzles that will effect the spray pattern-and then you can kiss goodbye to meeting any emissions regulations.

The high boiling range of biodiesel isn't helpful either. Nor is the high viscosity when cold. Throw in the problem of limited availability and the uncomfortable question of competition with food crops and you can see why biodiesel just isn't the nirvana its proponents make it out to be.

Any - Who's had their DPF removed? - RT

Biodiesel needs to be grown originally as a crop - instead of food crops or chop down more rain forest, neither of which is acceptable.

Any - Who's had their DPF removed? - unthrottled

Not when there's so much shale gas to be exploited. Sure, fracking isn't without problems, but there are fewer problems with that than there are with a lot of the alternatives.

Any - Who's had their DPF removed? - heavy right foot

there is no true way to live a clean eco freindly lifestyle in todays world, we require too much of everything, and the world population is too great. we all want to drive our cars around, wear clean clothes, have fresh water from a tap, exotic food all seasons and an endless supply of electricity for all of our stuff.

problem is there is no available enviromentally risk free solution available to people, all that can be done is small steps, but because we have lived with the idea of oil and gas for all things, implimenting new ideas is costly, impratical and for some scary and inconveinent.

no on likes the idea of a wind farm on their doorstep or a solar farm (i live near the devon cornwall border so theres lots around here), but if someone doesnt then there wont be any, but not to forget all those loverly components and minerals that make them have probably been extracted from a opencaste mine in south america and shipped halfway round the world for refining.

or how about biomass power stations, there isnt enough wood produced locally so they have to import from scandinavia or somewhere, how does it get here on diesel boats. so much for carbon nuetral, then how about building the stations.

but i/we digress.

i havent removed my dpf but would comsider doing it and a remap and any other polution reducing mods that help, overall.

Edited by heavy right foot on 02/07/2013 at 17:19

Any - Who's had their DPF removed? - unthrottled

i havent removed my dpf but would comsider doing it and a remap and any other polution reducing mods that help, overall.

What sort of pollution reducing modifications do you have in mind? It's easy to forget that the supposedly 'complex' DPF has no moving parts! They have a >90% trapping efficiency of most particulate matter.

Yes, there's a pressure drop across the trap and, yes, there is a fuel consumption penalty in regenerating the filter.

But the people who have problems with DPFs are the ones whose car use doesn't really warrant a diesel. You can spend a lot of time and money trying to solve a problem that isn't really that serious.

Any - Who's had their DPF removed? - heavy right foot

i havent removed my dpf but would comsider doing it and a remap and any other polution reducing mods that help, overall.

What sort of pollution reducing modifications do you have in mind? It's easy to forget that the supposedly 'complex' DPF has no moving parts! They have a >90% trapping efficiency of most particulate matter.

Yes, there's a pressure drop across the trap and, yes, there is a fuel consumption penalty in regenerating the filter.

But the people who have problems with DPFs are the ones whose car use doesn't really warrant a diesel. You can spend a lot of time and money trying to solve a problem that isn't really that serious.

my intention is to possibly save money, by refining my own wvo to biodiesel meeting EN14214.

after initial outlay of equipment, it should cost about 20ppl to make excluding oil cost. i am not opposed to the dpf but just wonder if it is that neccessary with a clean burn fuel like proper bio, that being said i would leave alone if no problems would be caused. i have not had a problem with dpf's on either of my lagunas ive owned, i dont do many long runs usually 30-40 m round trips at the moment but, that being said, i have a heavy right foot and i drive to the speed limit and get there quick. at bio price i could go further.

mpg is important and so is performance but savings possible could outway both.

it would be nice to get comments from those using proper bio if possible, theres alot of people opposed to the idea, but not sure if any have actually used biodiesel properly.

just curiousity at the moment

Edited by heavy right foot on 02/07/2013 at 18:43

Any - Who's had their DPF removed? - unthrottled

Out of curiosity, how much does WVO sell for these days?

I agree the process of making fuel would be an interesting project.

Any - Who's had their DPF removed? - heavy right foot

Out of curiosity, how much does WVO sell for these days?

I agree the process of making fuel would be an interesting project.

a localish garden center was selling 15 or 20 litre tubs for £5 each a while ago but have not looked recently.

there is masses of info out there and you dont need a white coat and clip board to do it, just some common sense and some simple skills. http://www.oilybits.com/biodiesel-processors/oilybits-biodiesel-processor-kits-60-and-120-litre/prod_622.html sell a good looking starter kit and explain the basics, but do a search for journey to forever, masses of info there and links to other stuff, mostly based in the usa but the science is still relavent. i have been mulling over for a long time, but got rid of my pug 405 (last of the mech fuel pumps) a few years ago, then put the idea aside. that said i dont know if i want to get rid of the laguna 2 for a car less safe (5* rating), so looking hard into the abillity to run it on bio i dont mind mixing fuel but 100% would be cheaper.

i should search this forum for relavent post.

Any - Who's had their DPF removed? - heavy right foot

Out of curiosity, how much does WVO sell for these days?

I agree the process of making fuel would be an interesting project.

a localish garden center was selling 15 or 20 litre tubs for £5 each a while ago but have not looked recently.

there is masses of info out there and you dont need a white coat and clip board to do it, just some common sense and some simple skills. http://www.oilybits.com/biodiesel-processors/oilybits-biodiesel-processor-kits-60-and-120-litre/prod_622.html sell a good looking starter kit and explain the basics, but do a search for journey to forever, masses of info there and links to other stuff, mostly based in the usa but the science is still relavent. i have been mulling over for a long time, but got rid of my pug 405 (last of the mech fuel pumps) a few years ago, then put the idea aside. that said i dont know if i want to get rid of the laguna 2 for a car less safe (5* rating), so looking hard into the abillity to run it on bio i dont mind mixing fuel but 100% would be cheaper.

i should search this forum for relavent post.

well.. nothing particularily relavent there!

usual naysayers and those lacking knowledge of what biodiesel actually is..

Any - Who's had their DPF removed? - Alan_C

Edit - Post deleted because you didn't give any disclaimer; so we have to assume that you were trying for free advertising,

Edited by Avant on 13/05/2014 at 23:39

Any - Who's had their DPF removed? - skidpan

(Post with link deleted)

Another pi55 poor attempt at selling some worthless snake oil.

Hopefully people on ths site are not as stupid as you think they are.

Edited by Avant on 13/05/2014 at 23:41

Any - Who's had their DPF removed? - alan1302

(Post with link deleted)

Do a proper independent scientific test and then get back to us.

Edited by Avant on 13/05/2014 at 23:41

Any - Who's had their DPF removed? - Mazda6dan2.0lD

I have a 2008 Mazda 6 2.0 Diesel turbo 16v direct injection. Granted the mileage is high @ 170k due to it being a fleet car previously. However it has a FDSH uptill 1 year ago when I bought it. Apart from general wear and tear the car is great! Its a joy to drive and great fuel economy and quick! I had the timing belt and waterpump changed and a few other bits like the drivers seat which had snapped a support, (prev driver must have been a big dude!)

Lately though the DPF light came on flashing. I took it in to get changed and they did a forced regen then tried resetting it. No change yet the car still drives great! Then the EGR valve showed a fault! Took it in and they removed it. It was sooted up but still looked ok. They cleaned out the valve and the manifold pipe, put the egr back as its expensive to replace and said keep an eye on it. The warning light came straight back.

It was due its MOT so it was taken in and passed with 4 advisories only, none related to the dpf or egr in any way. Lol. Drives like a dream and only cost me £1.20 for 2 rear licence plate bulbs.

Question is... could it be a sensor fault and is it worth getting the car remapped and terracleaned which combined is still cheaper than replacing the parts which may not be faulty anyway?

Any - Who's had their DPF removed? - Hamsafar

Be careful. My Audi was like this at 155,000 miles and eventually the gasket between the two halves of the turbocharger blew out due to the backpressure.

I had to get a new turbocharger (well probably could have got it refurbished) and unblock DPF (although these days pattern DPFs are much cheaper), so would probably keep it if it had happened now.

Any - Who's had their DPF removed? - Mazda6dan2.0lD

Had it unblocked, as was the egr valve. However the egr appears to have righted itself. No warning light now! Bonus! Now though the rear caliper sliders and pins have started seizing. Had new pads on both rear wheels! Standard! Pin was greased and it was fine for 12 hours. Now its back and worse. My bro in law is mechanic but lives in london, I am in devon. He said just replace pins and slider on dodgy wheel. Garage says need new calipers. Mmmm not sure bout that. Any suggestions?

 

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