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  1. #1

    03 MSX 140 RPM's won't get up

    Newbee to this site,
    I have a 2003 MSX 140 which I have owned since new, I put the jet ski in over the weekend and tough time keeping idle. After about 30 minutes of running the idle has now settled down and runs fine. Give it throttle and it just laughs at you, can't seem to get over 4000RPM, really bogged down. Took out of lake, ran with hose connected, runs great, RPM's all the way past 6000. Back in water and it seems like its really loading up.

    What can I check?

    Really some great info on these forums, I am on WakeWorld.com, Tigeowners.com, Tundrasolutions.com...keeps me busy

    Thanks


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Welcome to the Hulk

    Start with the basics;
    Cylinder compression?
    Red lamp or warning message on display?
    Does the display say 'Reverse'?

    If the above are all good, I would suggest replacing the TPS. They can fail over time, with all sorts of strange symptoms.

    Polaris Ficht Fuel Injected Engines

  3. #3
    Cylinder compression?
    Will do tomorrow What psi should I see?
    Red lamp or warning message on display?
    NO NO
    Does the display say 'Reverse'?
    Why would it say reverse, Never seen that ever ?

    If the above are all good, I would suggest replacing the TPS. They can fail over time, with all sorts of strange symptoms.
    Where is the TPS located?



  4. #4
    Quote Originally Posted by K447 View Post
    Welcome to the Hulk

    Start with the basics;
    Cylinder compression?
    Red lamp or warning message on display?
    Does the display say 'Reverse'?

    If the above are all good, I would suggest replacing the TPS. They can fail over time, with all sorts of strange symptoms.

    Polaris Ficht Fuel Injected Engines
    Cylinder compression?
    Will do tomorrow What psi should I see?
    Red lamp or warning message on display?
    NO NO
    Does the display say 'Reverse'?
    Why would it say reverse, Never seen that ever ?

    If the above are all good, I would suggest replacing the TPS. They can fail over time, with all sorts of strange symptoms.
    Where is the TPS located?

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Lightning Rod View Post
    ...If the above are all good, I would suggest replacing the TPS. They can fail over time, with all sorts of strange symptoms.
    Where is the TPS located?
    Rear end of the throttle body, tucked under the base of the flame arrestor.

    Click on this for more info;
    Polaris Ficht Fuel Injected Engines

  6. #6
    Quote Originally Posted by Lightning Rod View Post
    Cylinder compression?
    Will do tomorrow What psi should I see?
    Red lamp or warning message on display?
    NO NO
    Does the display say 'Reverse'?
    Why would it say reverse, Never seen that ever ?

    If the above are all good, I would suggest replacing the TPS. They can fail over time, with all sorts of strange symptoms.
    Where is the TPS located?


    OK checked the compression...all cylinders at about 110psi cold

    Where do I get a new TPS?, I have the original one on and it is of the sealed type. Will this effect the power under load or all the time. Also noticed the rear sparkplug was wet while the others were burnt tan, maybe a bad coil???

  7. #7
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by Lightning Rod View Post
    OK checked the compression...all cylinders at about 110psi cold

    Where do I get a new TPS?, I have the original one on and it is of the sealed type. Will this effect the power under load or all the time.

    Also noticed the rear sparkplug was wet while the others were burnt tan, maybe a bad coil???
    Polaris PWC Parts Sources

    A failing TPS affects many things. It is common for the engine to rev freely out of the water, but not in the water under load.

    You can check the ignition coil ohms. The numbers are in the previously supplied links.

    In addition, you can swap the PTO (rear) primary and spark plug wires with the CENter cylinder, and see if the wet spark plug problem moves to the center cylinder. Swap the two thin wires, and swap the two thick wires.

    If the wet spark plug problem remains with the PTO cylinder, then the EMM is suspect, and likely needs repair.

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