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Cylinder 2 doing some misfiring

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by C Clay, Aug 12, 2024 at 11:48 AM.

  1. C Clay

    C Clay Member

    Joined:
    Nov 24, 2012
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    Location:
    Lexington, KY
    Vehicle:
    2014 Prius
    Model:
    Four
    I’m noticing some cylinder 2 misfiring, confirmed by the Scanner App. No codes or anything. Just by the data on the app, it appears to do it around 1300 RPM, yesterday on a 40 mile drive it did it maybe a dozen times.

    310,000 miles. Head gasket, plugs, EGR service - done around 50k miles ago.

    What to check? First thing I was thinking was maybe to swap the coils and see if the misfire goes somewhere else.

    While I’m there- I’ll do the EGR service (which I didn’t do myself, but I’m sure I can. Check the spark plugs also.

    Is that what you all would suggest as first steps? MPG is strong, it can be 50 if I drive it right. No loss of coolant, no hard starts.


    iPhone ?
     
  2. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Sounds sensible.
     
  3. C Clay

    C Clay Member

    Joined:
    Nov 24, 2012
    289
    52
    0
    Location:
    Lexington, KY
    Vehicle:
    2014 Prius
    Model:
    Four