You may have the problem I have and it's been looked at by 2 Indys and I've picked the brain of a stealer tech.... the best guess and a very uncommon problem, is that the Vibration Dampner/Reluctor Ring needs to be replaced.... supposedly... If you ever solve the problem let me know... I am planning on doing mine in the spring...
Other possible solutions, Crank Sensor... but you'll get crank faults from a bad reluctor.... O2 sensor or O2 relay.... PCV plate....
But I have done all those fixes and mine still has the problem...
Originally Posted by
kcld
I have a 95 540i that 'cuts out' over 3000 RPM until the engine has been thoroughly warmed. It was even an issue when the weather was warm but now that winter has set in I need to drive for 15 minutes - well past the temperature guage registering normal - before the engine will rev past 3000. I believe I read somewhere that the engine management system will limit RPM's until the engine is warmed but this 'cut out' is on the verge of violent, it appears to be shutting down the ignition entirely until the RPM's drop below 3000. Since this usually occurs under moderate load it results in the whiplash effect! I had a crankshaft positioning sensor go out a few weeks ago and replaced it, but the bucking continues... Any suggestions on where I should look?
Current
2008 M5 6 Spd
2000 Z3 2.8 5 Spd MSport
2012 X5 35d Sport
1995 540i 6 Spd
1992 535i 5 Spd
Former
1995 530iA
1986 635CSI 5 Spd
2011 X3 2.8 MSport