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View Full Version : Please help audi a4 2.5 tdi starting problem



Ejmecc
04-10-2015, 10:23 AM
Hi all iam new to this forum
I have a 2003 audi a4 2.5 tdi quattro engine code bau
it wont start on cranking but it will start if you bump start it. When it has warmed up switch it off and then it will start on the key but it takes about between 15 and 30 seconds of cranking then starts.
there are no fault codes showing
i have changed the fuel filter and the non return valve on the filter
iam 100% sure that there is no air lock in the fuel
i have not checked the timing
i have found that the coolant senser plug is slightly corroded on all 4 conections but not open circuit i will change that today
under cranking the the injection pump has a 10.6 v feed could that be a problem
the battery is new
any help and advice would be great

adamss24
04-10-2015, 07:30 PM
I would check timing first...