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One of the first questions that should always be answered when diagnosing fuel related complaint on fuel injected engine is What is the fuel pressure All too often technicians...
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not sure of what you mean
glow plugs are there to assist the instant start of the diesel engine
it will wind over well without the plugs operating but takes longer to heat the compressed air in the cylinders to fire the diesel being sprayed in
if it starts and is still sluggish to respond to the accelerator , that is a different problem to the glow plugs
I'm thinking low fuel pressure if common rail diesel and bad injectors squirting and not atomizing
have a proper diagnosis done by an accredited professional diesel repair shop
if it is a common rail diesel, the timing is set by the ECMas the pump just supplies pressure to the injectors which are operated by timing from the crank sensor through the ECM
talk with a specialist diesel shop as the pump pressure may be too low ( should be in the vicinity of 25,000 PSI)
run the fault codes
if it is not common rail then it could be more of an accelerator setting ( not getting full throttle ) or a governor problem
in any case it will require a special tool to set the timing so again talk with a specialist diesel shop
I think you have leaking injectors, after shut off raw fuel dips into cylinders and then on start causews the black smoke unitil it is burned off. Any dealer has the equipment to leak test the system.
The first thing to do to save money when the engine stops performing is to run the fault codes. I suggesting that if you do you will find a fault with the canister purge valve /solenoid that is preventing the fuel getting to the injectors.
that sounds like the fuel return hose on one of your fuel injectors. You should get about 2 ft of hose and replace all of them including the one in back that is capped and the one to the injector pump. Im guessing when this happens there is fuel everywhere?
sluggish/cold start "problems"with any VW group product can be put down,in a lot of cases,to dirty injector nozzles,use redexe/wynns injector cleaner at 1 can to 1/2 tank fuel and you will feel a difference.as for the oil,VW group,use 10/40 semi synthetic in ALL their engines.(except w12 0/40)using a thin oil would pass the rings/valve guides and cause a carbon buildup inside the chamber......try it and see.....
Hello
Welcome to FY,
If breaks were just replaced, i would check the calipers and hand brake cables for somethingdragging.
I also would check the fuel system to see if you need a fuel filter or a leaking injector for the sluggishproblem.
RD
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