Misfire - help please

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by bluu2, Oct 28, 2019.

  1. bluu2

    bluu2 New Member

    Joined:
    Oct 28, 2019
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    Location:
    diego
    Vehicle:
    2011 Prius
    Model:
    Three
    hey guys I have a 2011 toyota prius my engine misfires at random times only when idling it shakes and if I put it in drive it either starts shaking or it shakes really low so you don't notice it but it never misfires when I drive it most of the time after a misfire I don't get a check engine light or a code on the scanner but rarely cylinder 2 always shows up and sometimes cylinder 4, I have changed ignition coils, spark plugs, and mass airflow sensor but nothing helped any suggestions what this could be? took it to a mechanic to check it out he drove it and said everything looked fine on his computer I'm not sure what it is and why it only does it when idling but it happens rarely. i'm also only getting 28 mpg
     
  2. tankyuong

    tankyuong Senior Member

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    Location:
    Central MO
    Vehicle:
    2010 Prius
    Model:
    III
    Blown head gasket
     
  3. bisco

    bisco cookie crumbler

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    Vehicle:
    2012 Prius Plug-in
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    Plug-in Base
    welcome!

    how many miles on her?
     
  4. bluu2

    bluu2 New Member

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    Vehicle:
    2011 Prius
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    Three
    282k miles I don't see any coolant leaking but somehow it just disappears out of nowhere
     
  5. bisco

    bisco cookie crumbler

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    Plug-in Base
    yep, that's the head gasket as tank stated above, the coolant is coming out your exhaust
     
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