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Read my lips: A running/buzzing fuel pump DOES NOT MEAN IT IS PUMPING!!
dont understand me wrong i really appreciate the help. i agree that a buzzing pump does not mean ist is pumping. but i think a totally silent pump does mean that it is not pumping...
i disconnected the fuel line at the bulkhead and checked for fuel. there was fuel when i cranked the engine, so i think my mate didnt listen good if the fuel pump was running when i cranked the egine. so i thought, i have spark and fuel, why doesnt it start ? i finnaly found the problem, all 5 inejctors were stuck, i needed to give them a light bang with a hamer to loosen the plunger inside the injectors. after that the engine started
...i disconnected the fuel line at the bulkhead and checked for fuel. there was fuel when i cranked the engine, so i think my mate didnt listen good if the fuel pump was running when i cranked the engine.
That is the first time you said you did more than just listen for the pump.
Happy to hear that you found the issue. Very strange answer: stuck injectors. WHY? Has this car sat for a long time to allow the pins to "stick" (rust?).
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RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
i bought set for someone who told me they were as good as new. only a few months old. but i think he has stored them for a long time.
I guess we've all learned something about injectors today.
BTW, once you had established that there was fuel pressure in the fuel rail, my next suggestion would have been to check the power at the fuel injectors and then to do a fuel injector flow test (the rail off the intake manifold, with the injectors attached, each in a glass container, to check for flow, etc.)
The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
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