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Thread: Engine revving when fully engaging brake

  1. #1
    Join Date
    Sep 2020
    Location
    Dallas
    Posts
    2
    My Cars
    Bmw

    Exclamation Engine revving when fully engaging brake

    I recently replaced my intake hose because it had a few cracks in it, but before I could do that I needed the money so I just drove with my MAF unplugged, car rang great. Only when I would come to a complete stop or coming to a complete stop my rpms would jump up to like 1500 and back down over and over and the engine would rev constantly, well after I fixed the intake hose it still does it. But I have my MAF plugged in. also before I fixed the intake boot, my car wouldn’t stay on for longer than like 10 seconds, UNLESS I unplugged the MAF. I also cleaned the MAF recently. but I’m wondering what could that be ? Brake booster? MAF? CCV? I have an 2005 325i manual

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    8,599
    My Cars
    2018 BMW M240i
    You have multiple vacuum leaks. The intake needs to be smoke tested.

  3. #3
    Join Date
    Jan 2016
    Location
    Ca
    Posts
    5,820
    My Cars
    2001 525it
    Yup

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