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 New Member

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    2010 Prius
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    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.

     
  2. Mdv55

    Mdv55 Active Member

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    Wow. Lot of carbon. Have you done the cooler yet?
     
  3. PriusII&C

    PriusII&C Member

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    Good job!:)
     
  4. ChapmanF

    ChapmanF Senior Member

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    10mm socket for squeezing the wretched wire harness clips is worth the price of admission. Thanks!
     
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  5. Mendel Leisk

    Mendel Leisk Senior Member

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    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.
     
  6. Paul E. Highway

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    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!
     
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