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318Is Coupe Wont Sit Idle

coco123

By coco123,
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coco123 Newbie

coco123

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Hi new to this site am looking for some info my 318is coupe just wont sit right when idle revs are up and down just had service still doing a freind reackons might be lambda sensor any one know anything about this any info would be great thanks

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TheMajor Rookie

TheMajor

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Could be your Mass Air Flow (MAF) sensor or your air control valve, normally the MAF sensor just needs a clean with some spray and the air control valve can get jammed up with carbon, just needs taking off and cleaned with a wire brush and some WD 40.

Hope that helps, good luck!

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Steve B Contributor

Steve B

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just a note. NEVER use WD40 in your ICV, throttle bodies or anything that needs just air, WD40 is an OIL, and can cause serious problems with an engine, use brake cleaner or throttlebody / carb cleaner, it evaporates leaving no residue and costs about the same if not less that a can of WD. just a word of advice, check your ICV, MAF, and lift your engine cover to check the pipe that runs over the top hasnt collapsed... or take it back to the service station to rectify it.

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