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Old 10-08-2012, 10:44 AM
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X3-terrestrial X3-terrestrial is offline
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Location: N.Miss - Memphis,TN Area
 
Join Date: Aug 2008
Posts: 2,632
Mein Auto: '05 X3, '95 M3, '89 MkI
Hi There!
I replaced my fuel filter over the weekend and through all my searches for information I ran into this on another forum, and I quote: " Remember to re install fuses and reset fault codes if you have had a lean mixture bank error.

To dispel myths, it is entirely possible for a fuel filter to cause drastic lean conditions and fuel pump noise. It only takes one really dirty batch of fuel, plus an old contaminated fuel filter to cause this issue. Clogged filters will throw up lean codes usually.. If their is fuel pump whine/groan, sluggish performance, feels like theirs hesitations and CEL on try this first.. You should change fuel filter with the pump if it is this bad anyway."

I had some episodes of running rough and even stalling, and before blaming a tired fuel pump, I did plugs and fuel filter to eliminate them from the equation. No codes in my case though.
http://www.bimmerfest.com/forums/sho...d.php?t=648694
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Last edited by X3-terrestrial; 10-08-2012 at 10:47 AM.
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