2004 A3 TDI DSG FUELING PROBLEMS!!
My 2004 MY A3 TDI with DSG is failing to start/fuel.
My fault diagnosis so far is as such.
The lift pump in the tank does not prime when the key is turned in the ignition, have removed the pump and bench tested it with a 12v source and it runs perfectly and also slaved into another car and it functions correctly in there too!!
I can make the car start and run when I apply the 12v source to my pump in my car but if I then remove the 12v source it then runs for several minutes then it will cough splutter and die, i'm guessing the pump runs continuously once the engine is starting? and thus the car then dying is fuel starvation as it has used up the fuel in the filter?
Is there a relay I can check if so what number, location or part number, or is signalled to work just from the ecu?
At a bit of a loss now i'm convinced that its:
A a fuel starvation issue that is causing the non starting
B the lift pump is not being signalled/powered to work by some means.