next problem......Fuel related

Discussion in 'Engine/Drivetrain' started by oahu grown, Oct 13, 2010.

  1. oahu grown

    oahu grown Toyotaholic

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    Thanks for all the replys. I just checked it tonight and theres no compression in #1 and #2. Going try see if i can find a replacement motor.

    I appreciate all the help you guys have given me.
     
  2. B.Y.E.

    B.Y.E. Toyotaholic

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    I was just going to mention a compression test... Anyway, check if your valve train is still intact before you consider it toast... Another possiblity is the head gasket is blown @ the fire ring between those two cylinders or is just blown and needs replacement...
     
  3. oahu grown

    oahu grown Toyotaholic

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    I was told that if the headgasket was blown it would still show some compression, cause its more of like a slow leak.

    And by valve train you mean if the head is still good?

    I dont even know what i want to do right now. Such a downer.
     
  4. k54frog

    k54frog Newbie

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    OG,
    Backfire means the fuel is igniting and that means you're getting spark and fuel. It's just not being effective. I suspect :thinking: removing the vacuum hoses altered your timing somehow and caused undue stress on the gasket.
    I'm in favor of the blown head gasket theory. When you add up the symptoms they point in that direction.
    1) Loss of compression in two adjacent cylinders is highly suggestive of a blown head gasket. If enough of the gasket is missing you may find no compression, much less enough compression to start.
    2) Did the frequency of the "helicopter" sound get slower as the engine rpms got slower? You may have been hearing the compression whooshing back & forth between the cylinders rather than pushing on the pistons.
    3) The backfire is probably due to the ignited fuel mixture making its way into the adjacent cylinder while the piston was not in the compression stroke.
    4) Sudden loss of power and stalling support #1.
    Definitely pull the head & look at the gasket and top of the piston domes. Don't forget to check all the valves and seats when you have the head off. I'll bet all you need is the gasket and to adjust the valves when you're through. Sure is a lot cheaper than another engine.
    Good Luck.
    -kenny-
     
    Last edited: Oct 16, 2010
  5. oahu grown

    oahu grown Toyotaholic

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    2) Yeah the sound got lower as the RPMs dropped. Then it just stalled out.

    And yeah im going to pull the motor apart. Dont got enough money for a new one anyways, so might as well take this apart first and examine the situation. Then take it from there.
     

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