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code po191 20 Jun 2011 (Ask HJ)
Problem with high fuel pressure shutting my Citroen Relay van down while driving. I've changed high pressure pump, regulator, in tank pump, rail sensor,... -
EEC Diesel Tax 12 Apr 2011 (Ask HJ)
Read that EEC are proposing to base fuel tax on energy content rather than volume and to have separate taxes for carbon dioxide and fuel. This could... -
Our Vauxhall Zafira won't start if left for a few weeks - any ideas? 15 Aug 2010 (Ask HJ)
If my W-reg Vauxhall Zafira is not used for several weeks it is extremely hard to start. We have had a non-return value fitted in the fuel line as the... -
Can premium fuel prevent a DPF from clogging up? 29 May 2020 (Ask HJ)
I have read that buying premium diesel will help prevent the DPF from blocking up as it has additives in it. Is this true or am I wasting my money? -
Where can I get test specs for a specific Delphi fuel injection pump? 29 Aug 2010 (Ask HJ)
I desperately need the test specs and timing information for the Delphi diesel fuel injection pump model #9320A224G. I know I can get this when I purchase... -
Is it worth using premium grade petrol? 26 Feb 2018 (Ask HJ)
Is premium grade petrol good value? -
Can you recommend a car with good fuel economy on a budget of £6000? 9 Mar 2017 (Ask HJ)
I do approximately 20,000 miles per year, of which the majority is motorway driving. Can you recommend a car with good fuel economy on a budget of £6000? -
Auto 'box 'HOLD' switch - does it save fuel? 6 Jan 2014 (Ask HJ)
Does using the 'HOLD' switch on the Subaru Forester's auto gearbox reduce fuel consumption? And is there any downside to using it other than reduced acceleration? -
Which fuel should I use in my Audi S5? 5 Oct 2013 (Ask HJ)
I've just bought an Audi S5 Sportback; the preferred petrol is 95 RON as marked on the filler cover. Can I use Shell Vpower or is this too rich? -
Fuel injector change - easy? 9 Jan 2013 (Ask HJ)
I am just inquiring whether changing the fuel injectors on the scenic is a straight forward job, i ave changed the plugs and coils at present but need... -
Do diesel engines use more fuel in Winter? 24 Feb 2012 (Ask HJ)
Can you tell me if diesel engines use more fuel in winter? -
Missing additive tank 24 Apr 2011 (Ask HJ)
My Peugeot 406 coupe is missing its fuel additive tank. What will it do to the car and its performance? -
Fuel additives 18 Apr 2011 (Ask HJ)
My daughter has used Lucas upper cylinder lubricant as a fuel additive with her Honda Civic 2.2 cdi and experienced much better mpg figures. Would this... -
How reliable is the Lexus GS300 and what's fuel consumption like? 26 Aug 2010 (Ask HJ)
I would like to enquire about the reliability of the Lexus GS300 2001 model. What is the average fuel consumption? Is there anything in particular I should... -
My Ford Mondeo won't start - where's the fuel pump? 7 Sep 2010 (Ask HJ)
My Ford Mondeo has been laid up for six years but has regularly been started. Today I am trying to start it and there is a spark at the plugs but they... -
Why aren't fuel pumps designed so that nozzles can't be replaced wrongly? 22 Aug 2010 (Ask HJ)
Can anyone confirm that all petrol nozzles at a fuel station will also fit in the diesel holder of the pump? Around eight months ago I filled up at... -
What's the fuel economy of a diesel Hyundai iLoad with a light load? 9 Mar 2017 (Ask HJ)
What's the fuel economy of a diesel Hyundai iLoad with a light load? -
Rattling fuel tank baffles 24 Dec 2012 (Ask HJ)
My 2003 SL350 has rattling baffles in the fuel tank. Mercedes will not repair FOC even though they lost a court case on this elsewhere in 2012. Can you... -
Can I run my classic Mercedes-Benz W123 E-Class on unleaded fuel with an additive? 11 Jun 2010 (Ask HJ)
I am buying a 1982 Mercedes-Benz W123 200E. It is in superb condition, having only covered 99,000 miles. Would it be better to run it with unleaded fuel... -
Peugeot 406 showing faults P1138, P0101 and P0191. 29 Sep 2012 (Ask HJ)
I own a Peugeot 406. The engine cut out whilst driving; fault was diesel pressure sensor. Replaced sensor. Engine diagnostic light on again and the car...
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