In Reply to: Engine surge or somthing unknown. PLEASE HELP!!! posted by Robert Brinson on July 04, 1999 at 23:14:45:
Couldn't help but respond after your plea above...
I have a similar problem in my 91 525ia. I have been told on several occasions that this can be caused by a failed or failing coil. Apparently, there was a batch that does this, dated Dec 95 (?) or earlier.
You might want to check to see whether you have any of these coils.
If you are interested in further details, you could search the archive here for "coil" or "surge" or something like that. You'll probably find the threads that addressed this issue and Callan's response to me on this exact question.