In Reply to: ? for M owners posted by Lonnie on June 10, 1999 at 11:00:34:
: We I start driving my car from cold start up, running 40mph in 4th gear, it feels like the engine is surging or missing. It's very,very mild and goes away once the temp gage reaches mid range. I've had the upgrade on the DME for throttle response when cold, but not the rough idle. It did this before that was done. Anyone else have this?
the crank sensor needs to be replaced as well as an upgrade on the DME. i had this also and it was rectified by the fix.