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Bob, UK Car Mechanic
Category: UK Car
Satisfied Customers: 2046
Experience:  Nvq Level 3, ATA tech, Ford tech,6 years with Ford, 4 years with MG Rover
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X-Type: Jaguar..smoking, they cleaned EGR Valve..fuel filter..warmed

Customer Question

I have a 6 years old X-Type 2.0L Diesel Jaguar, took it to main dealer for smoking, they cleaned EGR Valve and said all ok. This cured black smoke but next day would not start when warm, got car recovered back to garage, technician said needed new fuel filter and reprogramme to Engine management, done this got phone call say that this work has revealed another fault with clogged breather pipes, done this recieved another phone call saying this has revealed another problem with fuel rail, lost confidence with dealer drove car away, ran fine. Next day as car warmed up engine surged to high revs, rattled with lots of black smoke, glow plug light started flashing, engine management light came on, engine cut out. Please help.
Submitted: 7 years ago.
Category: UK Car
Customer: replied 7 years ago.
Relist: No answer yet.
Expert:  Bob replied 7 years ago.

Hi there hope i can be of assistance.


Ok, this may be related to the work that has recently been carried out. So i would advise that you take the vehicle back to the workshop who carried out the work.


However, from what you describe this sounds like a fuel pressure/metering fault.


The usual suspect is the fuel metering valve. If this is fault it will cause low fuel pressure, which means less fuel to the injectors causing black smoke (excess of air).


Thanks bob

Customer: replied 7 years ago.
answer is to vague
Expert:  Bob replied 7 years ago.

Further diagnostics are needed as there are many possible causes of this. We can only advise on the most common of faults as we dont know the actual fault codes that are now on the engine managemtn system that would give a clear indiocator as to what is going wrong.


A good place to start is with the previous work that has been carried out, ensuring no multiplugs, pipes, wiring etc have come loose/chaffed.


The most common cause is the fuel metering valve, but further diagnostics will need to confirm this. I cant give you a 100% accuarate answer here, without further diagnostics.


Thanks bob



Customer: replied 7 years ago.
Thanks for your efforts Bob

I have already got to your prognosis without any fault codes too.

I have come to this website for expert help beyond my own abilities.

How can we move this forward?
Expert:  Bob replied 7 years ago.

Ok ill opt out, and open the question to other experts.


Thanks Bob