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Trying to resolve a problem on my car, e90 n52 218hp, some of you might have seen any of my posts on here before -
So I'm on to testing the fuel pump, and I noticed it doesn't prime (turn on before the engine actually starts) at 1st or 2nd stage position ignition (fob pressed, Start button pressed). Runs at about 10.9 to 11.8 volts once the engine is running, but with the fob in the slot and / or the start button engaged (without depressing the clutch) the fuel pump DOES NOT turn on. Now I know some cars' fuel pumps do not "prime", but from the information i found on this subject, I think this car's pump should prime for 3 to 5 seconds.
Anyone have any concrete information I can go on?
I realize this is an old post, but did you ever find an answer?
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