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EGR and engine trouble

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Bobert53, Jul 7, 2022.

  1. Bobert53

    Bobert53 Junior Member

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    Just finished an EGR cooler cleanup. 130k and totally blocked. Got it cleaned up and reinstalled. Double checked all the connections. When the engine starts it surges and stumbles, little response from the accelerator and finally dies. Suggestions? I'm stumped!!
     
    #1 Bobert53, Jul 7, 2022
  2. JC91006

    JC91006 Senior Member

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    Start it and drive off right away.
     
    #2 JC91006, Jul 7, 2022
  3. Mendel Leisk

    Mendel Leisk Senior Member

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    Did you push the pcv and fuel vapour hoses back onto the intake manifold?

    (just guessing)
     
    #3 Mendel Leisk, Jul 7, 2022
  4. ChapmanF

    ChapmanF Senior Member

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    Yes, my first thought is that something has been overlooked, even with the double-check.
     
    #4 ChapmanF, Jul 7, 2022
  5. JC91006

    JC91006 Senior Member

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    many people forget to plug back the maf sensor
     
    #5 JC91006, Jul 7, 2022
  6. Mendel Leisk

    Mendel Leisk Senior Member

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    IIRC I've done that, and it ran ok, 'cept had check engine light.
     
    #6 Mendel Leisk, Jul 7, 2022
  7. tankyuong

    tankyuong Senior Member

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    loose connection or connector
     
    #7 tankyuong, Jul 7, 2022
  8. Bobert53

    Bobert53 Junior Member

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    Thanks for the replies. Tore it all down again today. What a bear!! There are a couple of nuts and a stud down in there somewhere!!!
    Paid due diligence putting it all back together, especially the gaskets. I realized this is one of those units you don't tighten until all the bolts are in. The car fired right up as she should have. Happy camper here. Now to get the check engine light off......
     
    #8 Bobert53, Jul 7, 2022
    CR94 likes this.
  9. Mendel Leisk

    Mendel Leisk Senior Member

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    I had check engine light after one of my EGR forays. Might have been disconnected MAF, can’t remember. Anyway, after about 4~5 startups (after fixing the issue), light went out.
     
    #9 Mendel Leisk, Jul 8, 2022
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