Bimmerfest - BMW Forums - View Single Post - 335i Engine Hesitation between 2500 and 3000 rpm
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Old 01-01-2012, 08:26 AM
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Location: San Francisco
Join Date: Aug 2009
Posts: 10,410
Mein Auto: 2009 E93 N54
Originally Posted by jburke4689 View Post

I had the car scanned and there is a single code stored, (2AAF, Fuel Pump Plausibility). I took it to the dealer and they confirmed my symptoms (I did not tell them that I knew about the 2AAF and the TSB) and said I need a new low pressure fuel pump, the one in tank. I asked my service advisor if they were sure. "Why is it only in that rpm range?" He said the low pressure fuel pump is variable delivery and at that rpm delivery, that is the issue. I said OK but "fuel delivery at 2500-3000 rpm is different at each gear and varies with load on the engine." He said "we are sure that is the problem. I said "OK, do the repair." By the way, the BMW service bulletin says "do not replace low pressure components for 2AAF without testing a lot of other components first."
Sooooo, was the LPFP replaced?

You should be aware that LPFP problems will cause HPFP self destruct over time. Very interested in final resolution! Could be as simple as a dirty filter....
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