Hi guys, Recently i was driving home from work and my A4 (B6 2.5 tdi avent fwd 163bhp engine code BFC) began to hesitate for a short while and then cleared up, I stopped at the traffic lights and it started hesitating again so i decided to pull off the main busy duel carriageway, Once i came to a quite road the car was struggling to accelerate at all so i pulled over and then the engine cut out. Ive read many horror stories about the fuel pumps on these engines being prone to failure. I consulted vagcom and checked for any related engine faults/immobilizer faults and found nothing, Done a complete scan also and found no faults, I manually primed the fuel system to isolate the pump in the tank and that seems to flow ok (before and after filter), I cracked off a couple of injector pipes then cranked the engine (Old trick on HGV's we used to do after a filter change) and it was dribbling out rather than squirting up high between the clamp and the pipe, Checked for blockages in the feed and return pipes from the main fuel pump and they were both ok.
Also tried firing up on some easy start (i know people hate this) and it would catch on the easy start so im guessing compression is ok. Everything is pointing towards the main pump being at fault in my view, Ive removed the pump this morning and am considering posting it off to diesel bob tuning for some diagnostics on the pump before i decide to either refurb or buy second hand. Just wondered if anyone has any other ideas or could point out something i may have missed, Im not hugely experienced with diesel engines but do allot of work on turbo petrol cars so im not worried about getting hands dirty, I welcome any ideas/suggestions