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2010 Prius 250 k miles misfires

Discussion in 'Gen 3 Prius Technical Discussion' started by ChiTownDriveBy, Mar 23, 2020.

  1. ChiTownDriveBy

    ChiTownDriveBy Junior Member

    Joined:
    Mar 23, 2020
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    Location:
    Chicago
    Vehicle:
    2010 Prius
    Model:
    Two
    My Prius is misfiring and has a knocking noise at low rpms. I put new spark plugs and coils a month ago and they're burned. Any ideas ?
     

    Attached Files:

    #1 ChiTownDriveBy, Mar 23, 2020
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,796
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    are two of them missing ignitors?:eek:
     
    #2 bisco, Mar 24, 2020
  3. 2012 Prius v wagon 3

    2012 Prius v wagon 3 Active Member

    Joined:
    Sep 12, 2019
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    Location:
    Redwood City, California
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    They must have been fake / counterfeit spark plugs. In my opinion, the #1 factor to be concerned with when buying spark plugs. You may have cylinder damage due to the electrode tip breaking off and falling into the cylinder.
     
    #3 2012 Prius v wagon 3, Mar 24, 2020
    Grit likes this.
  4. cnc97

    cnc97 Senior Member

    Joined:
    Mar 13, 2018
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    Location:
    Evansville, IN
    Vehicle:
    2010 Prius
    Model:
    Three
    Those coils don’t really concern me as much as the missing center electrode.
     
    #4 cnc97, Mar 24, 2020
  5. Grit

    Grit Senior Member

    Joined:
    Aug 22, 2017
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    Location:
    Wilkes Land
    Vehicle:
    2012 Prius
    Model:
    Four
    Where or who did you buy your spark plugs from?
     
    #5 Grit, Mar 25, 2020
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