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P3190 after running rich

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by DAVID 4, Jun 8, 2023.

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  1. DAVID 4

    DAVID 4 Junior Member

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    But if I just put it in maintenance mode and let it run for minutes, it might self correct ignition timming, fuel injection timming, air/fuel ration?
     
    #61 DAVID 4, Nov 14, 2023
  2. ASRDogman

    ASRDogman Senior Member

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    Yes, but DRIVING, is different. Everywhere I've read about it says to not
    drive, or drive much. It's for testing. No one really says a distance except just
    enough for testing or diagnoses...

     
    #62 ASRDogman, Nov 14, 2023
  3. DAVID 4

    DAVID 4 Junior Member

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    Thank you ASRDogman.

    Tryed maintenance mode and it did not work. It run for abouth 30s and than shut off. It was knockin a but, but not serius.

    Is iis it possible, that computer make adjustments to compensate exoust manifold leak. Than I fix that leak, but computer still have that adjustment stored and can not runn correctly and can not start making new adjustments, becouse it shot down to soon?
     
    #63 DAVID 4, Nov 14, 2023
  4. PriusCamper

    PriusCamper Senior Member

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    Disconnecting the 12v battery for a few minutes will wipe out settings created from all the changes you made. It will restore to factory default settings.
     
    #64 PriusCamper, Nov 14, 2023
    Brian1954 likes this.
  5. DAVID 4

    DAVID 4 Junior Member

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    I got Techstream and now can upload more freez frame data.

    If anyobody can take a look at it and share its oppinion...
     

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    #64 DAVID 4, Nov 16, 2023
  6. DAVID 4

    DAVID 4 Junior Member

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    Hope this reads better.
     

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    #64 DAVID 4, Nov 16, 2023
    Last edited: Nov 16, 2023
  7. DAVID 4

    DAVID 4 Junior Member

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    I started tearing engine appart once again and seem the chain is bit lose.



    Does that mean I need to replace timing chain tensioner?
     
    #65 DAVID 4, Nov 16, 2023
  8. rjparker

    rjparker Tu Humilde Sirviente

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    A failed tensioner is possible but not common. However it’s easier than removing the timing chain cover. If that failed I would certainly tear down the timing chain cover before doing another hg.

    These two quotes point at another hg fail or possibly timing so bad it won’t start. It would seem something broke when you did the o2 sensor which makes it harder to believe timing or hg failed at the same time. Timing chain guides have been known to break and the timing chain might be stretched.
     
    #66 rjparker, Nov 16, 2023
  9. ASRDogman

    ASRDogman Senior Member

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    Nope, not normal! Hopefully, you didn't bend a valve.
    CAREFULLY turn the engine over with a breaker bar on the crank pully bolt. (clockwise as you're
    looking at it)
    Put it at TDC, check the cams, the marks should like up. If you don't see the marks on
    the cam, rotate the engine another turn, 360 degrees, and check the marks.

    Did you rotate the engine back a little to release the timing chain tensioner? You'll certainly
    hear it when the little clip drops and the tensioner springs out.

    Hopefully, you only have to remove the timing cover. Reset the chain on the marks, and
    reinstall the timing cover. Then install the tensioner, and rotate the engine counter clockwise
    to release the tensioner. You only have to go a few degrees.

    Then rotate the engine two complete rotations, 720 degrees, and put the crank at TDC.
    The marks on each cam SHOULD line up where they were when you put the timing chain on.
    The gold marks won't, but that doesn't matter. All 3 marks MUST align correctly or the engine won't
    run, or run well.

     
    #67 ASRDogman, Nov 16, 2023
  10. Mr. F

    Mr. F Active Member

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    Good call on getting Techstream, the FFD clearly shows you have misfires on Cylinder 1. I didn't see in your posts if you'd tried swapping coils/plugs/injectors, but this is definitely something you should try to see if the misfires follow the swapped components.

    And if you have codes other than P3190 (Cylinder 1 misfire means you likely have P0301), you will need to take care of those first.
     
    #68 Mr. F, Nov 16, 2023
  11. DAVID 4

    DAVID 4 Junior Member

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    Today I removed chain cover and check timing marks and all are ok. Than inspect tensioner carefully and looks, feels and work as it should. After putting chain cover back and install tensioner I did it precisely as described. 15 deg back, hear click from tensioner and see hock was lose. Than turn 720 degrees clockwise, wehn I notice that chain gets lose every time, the exhoust valve pushes shaft up.

    You can see that on this video, just jump to 13:14.


    Please comment...
     
    #69 DAVID 4, Nov 17, 2023
  12. DAVID 4

    DAVID 4 Junior Member

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    Thanks for that. First time use Techstream and did not know what to look at.
    You think that misfires can couse engine to output 20% less torque?
    P3190 is the only code, that make it difficult.
     
    #70 DAVID 4, Nov 17, 2023
  13. Rrrolfff

    Rrrolfff Junior Member

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    Coming in late - I got P3190, n it was fixed via a new set of coils (they were only 53 usd for 4). Before, it would start, then run a few seconds kinda rough, then shutdown. I swapped the coils, put it in maintenance mode, it ran for a few minutes (rough n smoky for a few seconds), all was good . See my thread about oil cap being left off - while I don't get why it caused the coils to go bad, new ones fixed P3190 . Good luck!
     
    #71 Rrrolfff, Nov 18, 2023
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  14. ASRDogman

    ASRDogman Senior Member

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    Oil shorting out the wiring...
    Glad you were able to get them going!

     
    #72 ASRDogman, Nov 18, 2023
  15. Mr. F

    Mr. F Active Member

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    I would have thought being composed entirely of organic compounds would make engine oil electrically non-conductive.
     
    #73 Mr. F, Nov 18, 2023
  16. DAVID 4

    DAVID 4 Junior Member

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    It could be, when its clean. But as soon as you get metal parts in it, it become conductive.
     
    #74 DAVID 4, Nov 19, 2023
  17. ASRDogman

    ASRDogman Senior Member

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    ??? Organic compound can conduct eletricity. Plus contaiminant in the oil....

     
    #75 ASRDogman, Nov 19, 2023
  18. DAVID 4

    DAVID 4 Junior Member

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    It think in my case it was leak in exoust manifold that cause to much fuel in combustion chainbor, and that cause stress on 350k km old ignition coils. Gonna tray new set of coils, hopefully there will not end on shelf, as many other parts I purchuse in past monts. :D
     
    #76 DAVID 4, Nov 20, 2023
  19. DAVID 4

    DAVID 4 Junior Member

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    Hi guys! Think I might get this year stupidity nomination for destroying it own prius. :barefoot:

    So I put timing chain back on, watching all marks, fallowing procedure on tensioner, by rotating back to hear click, than 720 deg clockwise. Put in new spark plugs and new ignition coil, put in coolant, tighten all nuts and bolts with torqu wrench. So far so good. But than it was time to put in oil and I started to get to cheap and filtered (thick textile fabric) used oil, becouse it had only 2000k km on it and put it back in the engine.

    :ROFLMAO: Thank you for applouse! :ROFLMAO:

    So when I started the car and it sound fine at start, but when lowering rpm started shaking. Than it raised rpm, sound fine and repead lowering rpm and shaking again. Repeated that 3-4 times, then real funn begeans when thick white smoke start comming out of exoust. It lasted abouth 15s, than engine turned off.

    Can anybody tell me what just happened?

    Techstream now shows P3190 and P0A0F, so I gain one more code.
     
    #77 DAVID 4, Nov 25, 2023
    Last edited: Nov 25, 2023
  20. DAVID 4

    DAVID 4 Junior Member

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    Attached is techstream freez frame data.
     

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    #78 DAVID 4, Nov 25, 2023
  21. Eddie25

    Eddie25 Active Member

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    Have you at any time since those codes first happened physically poured gas into the gas tank?
     
    #79 Eddie25, Nov 25, 2023
  22. DAVID 4

    DAVID 4 Junior Member

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    I turn on fuel pump in techstream, unhooked cilinder 1 injector and gas start flowing out. It is almost full tank of gas and new gas pump.
     
    #80 DAVID 4, Nov 25, 2023
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