Misfire Cylinder 4

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by gjkristi, Dec 16, 2025 at 9:34 AM.

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  1. gjkristi

    gjkristi Junior Member

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    Minnesota
    Vehicle:
    2010 Prius
    Model:
    Four
    The plugs are from a retail store not Ebay or Amazon. If it were a bad plug you would think a cylinder swap would move the issue.
     
    #21 gjkristi, Dec 22, 2025 at 9:33 AM
  2. ASRDogman

    ASRDogman Senior Member

    Joined:
    May 29, 2018
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    Location:
    Florida
    Vehicle:
    2010 Prius
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    Two
    :oops::oops::oops::oops::oops::eek::eek::eek::eek:(n)(n)(n)(n)(n)
    I don't understand why you don't listen......
    Spark plugs go bad, some were where when they were made.
    The ngk plugs took over 1000 miles before going bad.. They were new, from autozone...
    Even if you have bought them from Toyota, one or more could still go bad...

    You had the coils out. It's only one more step to swop the SPARK PLUGS.....
    Why do you not want to swop them? Are they stripped out and you don't want to mess with them???

    Other than the head gasket leaking, and the wiring you said you checked, the plug is the last thing....
    You are more than welcome to just keep dragging it out though.....
     
    #22 ASRDogman, Dec 22, 2025 at 10:51 AM
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