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Old 10-20-2011, 09:55 PM
Supercourse Supercourse is offline
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Location: British Columbia, Canada
Join Date: Feb 2008
Posts: 3,891
Mein Auto: 2004 X3 2.5i
Originally Posted by wbrproductions View Post
.... seems to be firing on one cylinder or maybe 2
I wouldn't suspect a clogged fuel filter (or fuel pump problem) unless the tank has been run to empty a few times.

If the starter is turning the motor over that energetically for repeated attempts, while agreeing that BMW batteries can fool you, I'd be looking at other things.

It does sound like a spark or mixture problem - could be too much air from a cracked intake boot (common issue at your mileage).

Less likely - time for new spark plugs?
Or, check that Bremi coil packs (if factory fitted) were replaced with Bosch ones under a voluntary recall notice for 2004's.
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