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2010 prius misfiring

Discussion in 'Gen 3 Prius Technical Discussion' started by FoxHound, Mar 10, 2019.

  1. FoxHound

    FoxHound Junior Member

    Joined:
    May 31, 2015
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    Location:
    Madison Wi
    Vehicle:
    2010 Prius
    Model:
    III
    The engone shakes like its trying to tear itself apart. Dadh tells me it is currebtky getting 22mpg.

    I get codes telling me that thwre is a miss fire in cylinder 1 and 2 and sometimes 4.

    I have replaced all 4 cops. When that didnt work i swapped around the coils yo see if one of the new ones was bad.

    When that didbt work i replaced the spark plugs.

    When that didnt work i cleaned the injectors and mass air flow. When that didnt work i vhecked the resistance of the 4 fuel injectors and they came in between 11.1. And 11.6. I havent beem able to find the ideal resistance listed foe these fuel injectors.

    I also cant find the i formation needed to check the mass air flow sensor.

    Anybody have any ideas on what else could be wrong?
     
  2. scona

    scona Active Member

    Joined:
    Dec 10, 2013
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    Location:
    Courtenay, BC, Canada
    Vehicle:
    2013 Prius v wagon
    Model:
    N/A
    Try a search on "Misfire" for more information. Unfortunately a common problem with many generation 3 motors.
     
  3. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
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    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    How many miles on the Prius?

    Has the egr circuit ever been cleansed?

    What about an oil catch can?

    Good luck and keep us posted (y).
     
    SFO likes this.
  4. FoxHound

    FoxHound Junior Member

    Joined:
    May 31, 2015
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    4
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    Location:
    Madison Wi
    Vehicle:
    2010 Prius
    Model:
    III
    Over 250k.

    I wull be cleaning the egr pupe tomorrow.

    I have no idea about an oil catch can
     
    Raytheeagle likes this.
  5. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
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    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    If the car is in Madison, you could always use @ericbecky as a resource :).
     
  6. FoxHound

    FoxHound Junior Member

    Joined:
    May 31, 2015
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    4
    0
    Location:
    Madison Wi
    Vehicle:
    2010 Prius
    Model:
    III
    Deforest actually.
     
    Raytheeagle likes this.
  7. Raytheeagle

    Raytheeagle Senior Member

    Joined:
    Jul 1, 2016
    11,251
    15,474
    0
    Location:
    Bay Area, California
    Vehicle:
    2019 Prius Prime
    Model:
    Prime Plus
    That’s not that far away;).

    Close enough for a consult if nothing else(y).
     
  8. ericbecky

    ericbecky Hybrid Battery Hero

    Joined:
    Mar 12, 2004
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    3,209
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    Location:
    Madison, Wisconsin
    Vehicle:
    2005 Prius
    Model:
    Two
    Sounds like you have a good handle on things.
    Methodically going through things.
    Not doing more than one change/test at a time.

    That's pretty high miles so it was probably good to replace some of those parts anyway.