Hello, I have repaired over 30000 vehicles in my career and I dependence to question you questions back I am not there in person to accrue facts, data, or to test your vehicle. I may question you to fake psychoanalysis in my stead. If study is needed and you would rather not function testing, I can find the money for my best advice, Fuel pressure?
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Thanks for your response. I just checked what you mentioned, that I hadn't already checked, except fuel pressure.Let me say you a little more just about the hardship history. It currently has a master tech qualified idle expose direct valve and tps installed. without moving anything, the last (used) ecu and my original, would control in the car without this symptom.
This could be a large vacuum leak ,with the MAF linked it is and no-one else measuring the air that is getting later than the MAF, appropriately if the intake manifold is sucking in let breathe the freshen to fuel ratio will be categorically out and cause the engine to stall. If MAF is disconnected the engine goes into a limp measurement and lets the engine run. similar to carb cleaner spray spray can in the place of the hissing as soon as the engine dispensation and past you hear the engine stall or rev well along there is the leak ,could be a bad vacuum hose bad gasket upon the manifold.
Photo Schematics for audi a4 engine fuse box
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