Erratic Revs 2004 535i

[Techdeckguy]

Hi, new to forum, 2004 535i sorry if asked and answered,
Has anyone had a significant problem with very erratic revs when cruising at 40 to 45 MPH?
Revs will swing wildly from 1200 to 1800 like it can’t find where it wants to stay.
Also problem is very bad in cold weather, but will go away as engine warms or on hot days it sometimes never does it.
Had it in for service but got the inevitable, “sorry can’t recreate the problem”
Thanks

 

[tazza0712]

Make a service person go for a drive with you from the dealership. We've done that multiple times, that way we know the problem is "recreated" =D

Sorry, don't know anything about your issue though.