Rough Idle Following Head Gasket Replacement

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by TwoPriusInTenn, Dec 19, 2020.

  1. TwoPriusInTenn

    Joined:
    Nov 27, 2015
    141
    44
    0
    Location:
    Florida
    Vehicle:
    2004 Prius
    Model:
    Base
    Just replaced the head gasket on my daughters 2012. When I put it back together, I discovered it had went out of time by one tooth on the crank shaft sprocket so I took off the timing chain cover and reset that. All the mark line up the way they are suppose to, so that appears to be good now. Went to start it up and after the initial rough idle it smoothed right out then back to rough idle again and then will smooth out again. There is no check engine light and therefore no codes.

    Did not replace the sparkplug or ignition coils at this time. They were all replaced recently. A the the head gasket was going, these could be my issue if they were affected by moisture.

    Any ideas?
     
    #1 TwoPriusInTenn, Dec 19, 2020
    Last edited: Dec 19, 2020
  2. rjparker

    rjparker Senior Member

    Joined:
    Jun 6, 2008
    3,841
    1,985
    2
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    I have heard of maf or the map sensors who are not totally plugged in causing issues
     
    #2 rjparker, Dec 19, 2020
    Last edited: Dec 19, 2020
Loading...