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Thread: E39 rough idle

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  1. #1
    BMWHaus Contributor
    Join Date
    Aug 2013
    Posts
    831

    RE: E39 rough idle

    Quote Originally Posted by Dod
    I'd still bet its the vacume hoses betweeh the Air flow meter and the throttle body.
    well just disconnected airflow meter and car runs perfect..why is it running good with this unplugged.no cutting out at all but when I plug it back in straight away cuts out....

  2. #2
    BMWHaus Contributor
    Join Date
    Jul 2013
    Posts
    514

    RE: E39 rough idle

    Quote Originally Posted by satumashirt611
    Quote Originally Posted by Dod
    I'd still bet its the vacume hoses betweeh the Air flow meter and the throttle body.
    well just disconnected airflow meter and car runs perfect..why is it running good with this unplugged.no cutting out at all but when I plug it back in straight away cuts out....
    Thats it that's you sorted. Just get a new one.
    Runs fine for now as it is no longer sending crazy info to the engine management. But you still need to get it sorted asap.

    I think the maf-shop.com is a good bit cheaper but some managed to replace the sensor only from VAG dealer as it is the same one, as bmw does not sell the sensor on its own.

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