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Thread: 2007 335i

  1. #1
    Join Date
    Mar 2018
    Location
    Jacksonville nc
    Posts
    3
    My Cars
    2007 335I sports package

    2007 335i

    missfires at idle, and under heavy acceleration, also just recently will take longer then usual to start after car is warm (will start perfectly fine at cold start) . Missfire is not consistent and begin after changing spark plugs and installing jb4 tuner. I took it to the mechanic and they cleaned the fuel system, then the missfire continued and they concluded that the spark plug gaps were off, so i bought the recommended spark plugs again (pre-gapped), and changed them all out. The missfire is inconsistent and lightly makes car stutter during idle.Problem still remains

  2. #2
    Join Date
    Jul 2004
    Location
    Houston, TX
    Posts
    12,459
    My Cars
    36 Cylinders
    Step 1, Read codes.

    a. you didn't seat your coils correctly back on
    b. you need new ignition coils, and the 'tune' brought out the problem. coils are notoriously common on that car. New brand name coils for proper result.


    if you have 30bb code or similar, you need a dme.
    -Abel

    - 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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