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Fuel leaking at cylinder 1 and 2

Discussion in 'Gen 2 Prius Main Forum' started by LINGARAJU GOTTUMUKKALA, Oct 20, 2024.

  1. LINGARAJU GOTTUMUKKALA

    LINGARAJU GOTTUMUKKALA Junior Member

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    Having been dealing with death rattle and recent p0300, 01 and 02 codes, finally mustered courage to do a diy and changed all spark plugs and ignition coils but the problem persisted, mustered even more courage and replaced 1 and 2 cylinder fuel injectors and death rattle is gone and codes gone and sounds like new engine, but fuel keeps leaking from possibly both the 1 and 2 injectors, reseated several times and used stock O rings but it persisted and I gave up, for anyone who has done this how did come about fixing this, car has a out 260k miles and no other issues, please help, thank you.
     
    #1 LINGARAJU GOTTUMUKKALA, Oct 20, 2024
  2. dolj

    dolj Senior Member

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    You probably damaged the o-rings when you originally seated the injectors. Get a new set of o-rings and do the reseat job again. Smear some fuel on the o-ring just before seating to act as a lubricant, which will aid the o-ring seating without pinching and damaging it.
     
    #2 dolj, Oct 20, 2024
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  3. LINGARAJU GOTTUMUKKALA

    LINGARAJU GOTTUMUKKALA Junior Member

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    Fuel is leaking from the top part of the injectors and I tried replacing those top O rings from the discarded stock ones but could not take them out without damaging them. IDK what else to do apart from buying another pair of stock injectors.
     
    #3 LINGARAJU GOTTUMUKKALA, Oct 20, 2024
  4. mr_guy_mann

    mr_guy_mann Senior Member

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    Buy new injector O-rings - parts store or dealer. I lube them with petroleum jelly (vasaline) and gently force them over the end of the injector.

    If you use (sharp) metal tools like a screwdriver or pick, that can cut the O-ring & they'll leak.

    Posted via the PriusChat mobile app.
     
    #4 mr_guy_mann, Oct 21, 2024
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  5. ChapmanF

    ChapmanF Senior Member

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    Not being careful enough with those O rings can be a common source of trouble. Pictures from the manual, from this older post:

    [​IMG]
    [​IMG]

    I also check for leaks after reassembling the fuel rail to the engine, but before trying to start, just by using a hand-operated pushbutton to jump between the fuel-pump relay contacts. I try to avoid having fuel possibly spray unexpectedly around an engine that's trying to start.
     
    #5 ChapmanF, Oct 21, 2024
    Last edited: Oct 21, 2024
    LINGARAJU GOTTUMUKKALA and Brian1954 like this.
  6. LINGARAJU GOTTUMUKKALA

    LINGARAJU GOTTUMUKKALA Junior Member

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    Thank you everyone, I replaced the top O rings from the discarded stock injectors, applied a dab of engine oil and they slid in nice and not leaking anymore, drove around 30 miles and all is good but now when I am pushing the gas hard the torque seems to wavy and not smooth, any ideas.
     
    #6 LINGARAJU GOTTUMUKKALA, Oct 21, 2024
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