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Old 10-21-2019, 12:06 AM
cn90 cn90 is offline
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,396
cn90 is on a distinguished road
Originally Posted by mitch500 View Post
Suprised no one said to clean the ICV
Just want to say thanks to mitch500.

My 2004 X3 2.5i with 95K miles.
Intermittent stalling 2-3 times year, then started right up and no problem for the next 4-5 months.
Also occasional rough idle rpm.

I suspected the ICV, then once removed, sure enough, dirt build-up is seen on the rotating valve.
Cleaned with carb cleaner.
All is well, engine is smooth now.

PS: While there, I replaced the Intake Rubber Boot. The factory rubber boot from 2004 did not look to bad.
Just minor cracks on the rubber tube leading to the ICV but no leak.
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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