vw polo 2002 faulty engine management sy -
vw polo bought from new 1 March 2002.
After 11 months engine management system warning light came on. Dealership said it was a faulty coil and was replaced. This happened twice more. Once three days later and another a couple of weeks later.
About one week later engine management system warning light came on again. This time the dealership said it wasn't a faulty coil and they would try replacing all three spark plugs.
After just a couple of days the engine management system warning light reappeared and the car has now been at the dealership over a week. They have been trying to find the problem with no success and only in the last couple of days managed to replicate the appearance of the engine management system warning light but with an unknown cause.
I have found the following on this website about the vw polo 2002 :-
"The dealer attempted to fix the faulty engine management system and rogue warning lights 4 times without success (this is a generic fault with most of the cars, they told me)." He managed to reject it after 6 months. Which? subscribers also report engine management system problems (maybe the VAG universal coil problem)"
does anyone have a similar experience or any advice on what to do next?
This is going to sound absolutely crazy! Engine management light came on my wife's Year 2000 Polo. VW dealer said 'Check whether the brake lights are working'!!! It had a faulty brake light switch which interfaces with the engine management system - it's to do with the fly by wire accelerator system (work that one out!). So check you brake lights!
with regards to my previous post \"vw polo 2002 faulty engine management system\" 13 March. The dealer has now informed me that two of the cylinders are faulty (we only have three!), and just wants to replace the two cylinders.
Do you think this is acceptable, or should we ask for a replacement/refund.
With regards to your previous post - I have included this current post along with the previous post as it is all on the same subject. This saves people having to look back at the previous post for reference - as well as keeping things tidier. DD
>I'm curious to know in what way your 2 cylinders are 'faulty' >and how your dealer plans to replace these two cylinders -
>can you give us some more information ?
All the dealer will say is that they are "out of spec". They had to get a piece of equipment from VW to get them out, and they have been to sent to VW for testing. VW are sending two replacements for them to fit.
I don't think they know what is up with the car, and this is the most likely cause of the problem that they have been able to come up with. VW will only replace the car if they have tried everything. I find it strange that the car has run perfectly for nearly a year, and then when the coils started going faulty this happens. Could there be a link between the faulty coils and some sort of engine damage.
What have they actually replaced. Unless this engine is a radical use of a very old design concept (and i don't think it is), you can't replace a cylinder.
You might replace a cylinder liner, or a piston or piston rings, but not a piston.
I'd appreciate it if somebody who knows more would comment on the theory that if a coil is duff and there is no ignition in a cylinder, then there will be a lot of unburnt petrol around, which could accelerate wear - but i think it would have to run badly for a long time to make a difference.
What i would say is if there have been igntion problems for any while and it is still under warranty, get the garage to confirm the catalytic converter is alright or get it replaced under warranty before it's too late !!
vw coil failure causing further damage? -
Could someone please give me their opinion on the following sequence of events. The car had been running perfectly until the coil packs started to go. What about further damage i.e. to the catalytic converters.
VW Polo bought from new on the 1st March 2002.
17th January 2003 - Warranty repair to replace Cylinder 1 coil pack at 12653 miles.
27th January 2003 - Warranty repair to replace Cylinder 1 coil pack at 12945 miles.
25th February 2003 - Warranty repair to replace Cylinder 2 & 3 coil packs at 13999 miles.
4th March 2003 - Warranty repair to replace all 3 spark plugs at 14138 miles.
13th March 2003 - Warranty repair 2 valves, 2 hydraulic lifters in cylinder number 1 including replacing the Cylinder head gasket at 14380 miles.
vw coil failure causing further damage? -
I have included this current post along with previous posts as it is all to do with the same car/fault. This saves people having to look back at the previous posts for reference - as well as keeping things tidier. DD