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Message: <blockquote data-quote="elwine30" data-source="post: 102475">kelvinp,sometimes, it's hard to diagnose these kind of problems. if idle is bad, it can be due to icv, hoses or even your bellow. bmw engines do not tolerate air vacum leak. after your car is warm up, maybe your hoses are stabilized.best is to try to find a few things. I have 2 spare icvs. I can loan them to you to try. also i have the full icv set and also new bellow for you. i m willing to sell only if you are happy with it. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" />also do note, it can be a sign of head gasket leaking.... or other problems. so, do of other potential signs..</blockquote>