When i drive the x 4.4 2001 100 k miles on it in the morning it is fast and responsive . When the car gets warm (20 30 min of driving) it becomes slow and not responsive ( during little acceleration ( 1/4 of gaz pedal) i press the gaz pedal down further but the acceleration doesnt increase and the car requires more throttle than normal when i move off. No COde!!!! Any idea? Spark plugs , heat soak , maf or o2 sensor ( no code!!!) a lot of bmw owner suffer from this problem : http://blog.bavauto.com/1666/bmw-slu...ance-when-hot/. Also: Sluggish acceleration HELP!
Okay my 1992 bmw 325i has a tendency to get really sluggish off the line after you drive it for about 10 min or so. Its odd, right when I start it up its very responsive, but after driving for 10 15 min. the off the line acceleration becomes very low. Its like the rpm's shoot up normally but but the car doesn't agressively accelerate. I changed my O2 sensors, and spark plugs and still the same thing. Any ideas?

http://forums.bimmerforums.com/forum...php?p=22661725