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misfire / maf sensor

Discussion in '1st Gen. Tacomas (1995-2004)' started by boodacrf450, Oct 9, 2024.

  1. Oct 9, 2024 at 10:30 AM
    #1
    boodacrf450

    #1
    boodacrf450 [OP] Well-Known Member

    Joined:
    Jan 9, 2024
    Member:
    #441260
    Messages:
    52
    Vehicle:
    99 Tacoma 2.4L
    would a bad maf sensor cause a misfire at idle 1000 rpm it's at 12g/s seems high also spark plug in #1 cylinder looks fairly dry any help troubleshooting greatly appreciated thanks
     
    boodacrf450, Oct 9, 2024
    #1
  2. Oct 9, 2024 at 10:32 AM
    #2
    m3bassman

    #2
    m3bassman Well-Known Member

    Joined:
    Jan 16, 2011
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    #49376
    Messages:
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    Green truck
    Codes?
     
    m3bassman, Oct 9, 2024
    #2
  3. Oct 9, 2024 at 10:47 AM
    #3
    boodacrf450

    #3
    boodacrf450 [OP] Well-Known Member

    Joined:
    Jan 9, 2024
    Member:
    #441260
    Messages:
    52
    Vehicle:
    99 Tacoma 2.4L
    P0301 p0420
     
    boodacrf450, Oct 9, 2024
    #3
  4. Oct 9, 2024 at 11:00 AM
    #4
    ControlCar

    #4
    ControlCar My Moto: Help & Learn…period.

    Joined:
    Jul 22, 2023
    Member:
    #429578
    Messages:
    3,611
    Gender:
    Male
    First Name:
    Steven
    Sugar Land TX
    Vehicle:
    1996 Taco 2.4L 2wd Automatic
    Clock Volt meter/LSPV Delete/Hyundai 16’s/FP gauge/after 9months of wrenching ZERO oil leaks
    Would concentrate on the misfire code 1st…..

    P0420

    IMG_4678.png

    P0301
    IMG_4679.png
     
    ControlCar, Oct 9, 2024
    #4
  5. Oct 9, 2024 at 11:00 AM
    #5
    m3bassman

    #5
    m3bassman Well-Known Member

    Joined:
    Jan 16, 2011
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    Messages:
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    Gender:
    Male
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    Green truck
    Misfire cyl 1 and O2 sensor.

    How old/miles on spark plugs, wires and coils?
     
    m3bassman, Oct 9, 2024
    #5
  6. Oct 9, 2024 at 11:01 AM
    #6
    ControlCar

    #6
    ControlCar My Moto: Help & Learn…period.

    Joined:
    Jul 22, 2023
    Member:
    #429578
    Messages:
    3,611
    Gender:
    Male
    First Name:
    Steven
    Sugar Land TX
    Vehicle:
    1996 Taco 2.4L 2wd Automatic
    Clock Volt meter/LSPV Delete/Hyundai 16’s/FP gauge/after 9months of wrenching ZERO oil leaks
    Did both codes pop at same time?
     
    ControlCar, Oct 9, 2024
    #6
  7. Oct 9, 2024 at 11:07 AM
    #7
    m3bassman

    #7
    m3bassman Well-Known Member

    Joined:
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    A misfire can cause the O2 code, dumping unburnt fuel down the exhaust. So while it is a big code, the misfire being fixed may fix the O2 code. One thing at a time.
     
    m3bassman, Oct 9, 2024
    #7
  8. Nov 21, 2024 at 6:20 PM
    #8
    boodacrf450

    #8
    boodacrf450 [OP] Well-Known Member

    Joined:
    Jan 9, 2024
    Member:
    #441260
    Messages:
    52
    Vehicle:
    99 Tacoma 2.4L
    446000 miles on 99 tacoma 2.4l replaced coils no more p0420 code just intermittent p0301 code
     
    boodacrf450, Nov 21, 2024
    #8

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