1. Attachments are working again! Check out this thread for more details and to report any other bugs.

2010 Prius Intake EGR ports clogged runs rough from idle up to 65 mph

Discussion in 'Gen 3 Prius Technical Discussion' started by RobRig, May 24, 2021.

  1. RobRig

    RobRig Junior Member

    Joined:
    Oct 13, 2020
    6
    10
    0
    Location:
    Richmond, VA
    Vehicle:
    2010 Prius
    Model:
    Touring
    My 2010 Prius began to run rough at slow speeds and on deceleration beginning a month or so ago. Roughness got progressively worse to the point of running rough at any speed below 65 mph.
    I removed the intake manifold and cleaned the crud out of the EGR passages and made a 15 minute video.
    I'd like to share a YouTube link with the group for others experiencing similar problems.

     
    #1 RobRig, May 24, 2021
    WolfpackBill, BrianStranded, mikey_t and 2 others like this.
  2. Mdv55

    Mdv55 Active Member

    Joined:
    Dec 25, 2018
    246
    180
    0
    Location:
    Boston
    Vehicle:
    2011 Prius
    Model:
    Three
    Wow. Lot of carbon. Have you done the cooler yet?
     
    #2 Mdv55, May 26, 2021
  3. PriusII&C

    PriusII&C Active Member

    Joined:
    Oct 15, 2013
    370
    127
    0
    Location:
    San Jose, California
    Vehicle:
    2012 Prius
    Model:
    II
    Good job!:)
     
    #3 PriusII&C, May 26, 2021
  4. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    23,270
    15,067
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    10mm socket for squeezing the wretched wire harness clips is worth the price of admission. Thanks!
     
    #4 ChapmanF, May 26, 2021
    RobRig, Roger559, mikey_t and 1 other person like this.
  5. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    54,662
    38,207
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Yeah he says “a couple of months back” he did the cooler, words to that effect. The intake is the last leg of the Exhaust Gas Recirculation circuit; until it’s cleaned the EGR cleaning is pretty much for naught.
     
    #5 Mendel Leisk, May 26, 2021
    RobRig likes this.
  6. Paul E. Highway

    Paul E. Highway Active Member

    Joined:
    Mar 7, 2020
    199
    126
    0
    Location:
    Hawaii
    Vehicle:
    2010 Prius
    Model:
    Four
    There have been several revisions to the Gen 3 intake manifold, I replaced mine with the current version when I did EGR cooler on my 2010 at 156K. Will follow your procedure next time, excellent video!
     
    #6 Paul E. Highway, May 26, 2021
    RobRig and mikey_t like this.
(You must log in or sign up to post here.)