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Thread: MAF Issues -- Unplugging Works, New Replacement Does Not? Tf?

  1. #1
    Join Date
    Jun 2023
    Missouri, USA
    My Cars
    2005 BMW Z4 E85 Roadster

    Angry MAF Issues -- Unplugging Works, New Replacement Does Not? Tf?

    Car almost spontaneously developed an issue where the engine would bog over 2k rpm and had a super rough idle. Unplugging the MAF immediately fixes the issue at hand.

    Bought a brand new replacement OEM part, and the issue still exists with the new part installed. But simply unplugging the MAF connector continues to be ok.

    What else do I need to look for here? Already replaced the sparks/coils cause I initially thought it was an ignition issue.

  2. #2
    Join Date
    Jul 2004
    Houston, TX
    My Cars
    36 Cylinders
    Vacuum leaks in the intake tracts allowing unmetered air in. Perform a pressurized smoke test to see them all and replace all the parts leaking.

    Your MAF was reporting correctly.

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

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