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Old 11-07-2010, 06:23 PM   #14
dmax
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Join Date: Aug 2006
Location: NJ
Posts: 23,711
My Ride: '99 328i 300K miles
OP...your little dip might be a very early...very early indicator of icv with a little dirt on it. Nothing serious...looks like to me anyway.

But, when it starts surging up and down...then search 'idle surge'--there's a massive thread on it...some had mixed results...I posted after I took a trip to throttle body myself and fixed my issue. Don't know when I did that trip...but been idling steady at 700 since...cleaned everything in my path and have written about it a lot...evidently too much...so I'll just let you search!

Doug
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