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  1. #1
    Picturemn2's Avatar
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    99 GTX Ltd Cutting out at high RPM

    99 GTX Ltd Cutting out at High RPM
    Hello all,



    Have a 1999 GTX Limited that keeps cutting out at high RPM's
    this is a strange one, am ready to pull the rest of my hair out (as i have not much left )
    any way checked charging system charges great, checked ohms of stator right on the money, switched MPEM from identical ski still does it, changed pickup. checked grounds, changed DESS Post, Changed start button, new battery, checked all connections i could. the engine is not seizing it will refire right away and before it stops completly you can push start button and will get up and go. just high rpms cause it to shut down..

    have a scope and the crank sensor it still putting out a good signal when the spark shuts off....


    really giving me a headache on this one....


    thanks

    Bill


  2. #2
    TX21's Avatar
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    Wow you have replaced a lot of stuff. Rebuilt the carbs yet? Checked the power valves, reeds?

  3. #3
    Picturemn2's Avatar
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    Yes have checked all the basics

  4. #4
    TX21's Avatar
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    I am sure you checked/replaced the spark plugs then. Plug wires, boots? Had a drag car that a coil caused a problem but tested out fine. If you have another ski swap the coil.

  5. #5
    JayZ's Avatar
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    have the fuel lines been replaced? try running the ski on reserve. the fuel switch could be clogged. also try running the ski with the gas cap off. one of the check valves could be malfunctioning.

  6. #6
    96XPSS's Avatar
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    Have you swapped coils with the identical ski yet?

  7. #7
    Picturemn2's Avatar
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    to give a better overview, the ski does not bog down or anything when it cuts out. going full and then dead in water, starts right back up no problem

    thanks

  8. #8
    TX21's Avatar
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    Quote Originally Posted by Picturemn2 View Post
    to give a better overview, the ski does not bog down or anything when it cuts out. going full and then dead in water, starts right back up no problem

    thanks

    What motor is in that ski?

  9. #9
    96XPSS's Avatar
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    Quote Originally Posted by Picturemn2 View Post
    to give a better overview, the ski does not bog down or anything when it cuts out. going full and then dead in water, starts right back up no problem

    thanks
    Sounds like you are seizing a piston. Have you pulled the RAVES and inspected the sides of the pistons for scuffing?

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