View Single Post
Old 01-09-2013, 02:39 AM   #18
peytonracer4's Avatar
Join Date: Jan 2010
Location: Valparaiso, IN
Posts: 7,756
My Ride: '00 328i
A vacuum leak will cause a high/erratic idle and also create a whistle/whine/purr noise.
It sounds like this is your problem. Sometimes they can be hard to diagnose without a professional smoke test.
peytonracer4 is offline   Reply With Quote