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After egr cleaning codes remain didnt fix shaking/stall

Discussion in 'Gen 3 Prius Technical Discussion' started by William11348o, Aug 16, 2023.

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  1. Melthias

    Melthias Junior Member

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    2012 Prius
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    When I mounted my catch can I took the intake off for access and in the reinstall process found that the holes in the little EGR pipe were ever so slightly off from where it screws into the intake. I loosened the screws of the intake, attached it to the little pipe and promptly forgot to go back and tighten the intake mounting bolts. When I went to turn the car on I had P3190 and P3191, but fixing the problem fixed the codes. This setup was a little different then yours, but maybe you had MAF issues, fixed them, but then left the intake bolts loose?
     
    #61 Melthias, Jan 2, 2024
  2. William11348o

    William11348o Junior Member

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    Still not running. i am wondering if my maf sensor looks ok but is actually failing. Could someone with a gen 3 and tech stream tell me what their maf reading is wiith the engine not running?
     
    #62 William11348o, Jan 19, 2024
  3. ChapmanF

    ChapmanF Senior Member

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    My money is on zero grams per second when the engine isn't running. What are you seeing?
     
    #63 ChapmanF, Jan 19, 2024
    burebista and Brian1954 like this.
  4. burebista

    burebista Active Member

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    I have an old screenshot from Torque if it helps. :)
    [​IMG]
     
    #64 burebista, Jan 20, 2024
  5. William11348o

    William11348o Junior Member

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    #65 William11348o, Jan 21, 2024
  6. William11348o

    William11348o Junior Member

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    0.18 mg/sec with original Denso MAF and 132.92 with cheapy version.
     
    #66 William11348o, Jan 21, 2024
  7. William11348o

    William11348o Junior Member

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    I have torque also but my TS maf is reading 0.18, very close. However my MAP is always reading 14 psi (1 atmosphere).
    Was your engine running?
     
    #67 William11348o, Jan 21, 2024
  8. burebista

    burebista Active Member

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    As far as I remember engine was not running.
     
    #68 burebista, Jan 22, 2024
  9. ChapmanF

    ChapmanF Senior Member

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    Cheapy version makes me wonder where all those 133 grams of air per second were going without the engine turning!

    100 kPa is also about one atmosphere (strictly, 1 atm is about 101.325 kPa or 14.696 psia).
     
    #69 ChapmanF, Jan 22, 2024
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