Quote:
Originally Posted by Scrippy
Hey everyone,
So I've been at a stop light on many occasions and felt/watched my idle fall to 500-600RPM when the day to day normal idle seems to be 750ish. When this dip in RPM occurs I've noticed that if I let off the brake on level surface (so I dont move) the RPM restores to that normal 750ish. The little knowledge I have over the whole S65 systems makes me think of a brake booster leak or vacuum leak. Do you guys have any experience/recommendations with this occurrence or a possible culprit? I'm super familiar with N54 and not so much with S65. I remember in my 335 the grommet between the brake booster and main vacuum line was a common failure. I personally changed the one on my 6 year old at the time 335 and saw an improvement on vacuum pressure. Thanx in advance!
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I have the same issue. Won't happen when the a/c is on. There was a thread a while back but not sure there was a conclusion/fix.
Edit: found it.
RPM drops on idle
http://www.m3post.com/forums/showthread.php?t=681269