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  1. #1
    bigbubba1989's Avatar
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    loss in rpm problem

    2007 rxp s3 supercharger, 14/19r, stock intercooler. i was running 8100-8120 rpms now it acts like it is pulling timing or something and will only run 7800-7980 rpms. didn't know where to start looking for the problem. bad gas, supercharger slipping.... any ideas?


  2. #2
    Focker Foggy's Avatar
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    CHeck / replace spark plugs. Change oil and filter (at least make
    sure level is where it's supposed to be).

    Check s/c to throttle body air hose.

    Try different premium fuel without ethanol.

    Which spark plugs are you using?? Will need 1 step colder
    plug with the S3 Charger. (ie denso ixu 27)

    Inspect wear ring and prop for damage or debris

  3. #3
    Gone in 3.0 seconds... RXPT400's Avatar
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    Quote Originally Posted by bigbubba1989 View Post
    2007 rxp s3 supercharger, 14/19r, stock intercooler. i was running 8100-8120 rpms now it acts like it is pulling timing or something and will only run 7800-7980 rpms. didn't know where to start looking for the problem. bad gas, supercharger slipping.... any ideas?
    What is your AFR at wot?.....maybe you are running lean and computer is killing your RPMs..

  4. #4
    bigbubba1989's Avatar
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    not sure on af ratio ill check plugs there are no boost leaks

  5. #5

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    mine did it when it filled up with water

  6. #6
    bigbubba1989's Avatar
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    filled up with water? there is no water in the hull

  7. #7
    bigbubba1989's Avatar
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    it sounds like it is skipping when you ride it at part throttle or full throttle

  8. #8
    King_Of_Fun's Avatar
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    Is the ski unhooking?... Ron

  9. #9
    bigbubba1989's Avatar
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    no ski is in flat water sea level

  10. #10
    speedskixp's Avatar
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    Quote Originally Posted by bigbubba1989 View Post
    no ski is in flat water sea level
    What was the weather like? Had it just rained? Was it really humid? Low pressure system hanging around? Old gas.
    Thes skis are very sensative to weather changes and crappy fuel. I have seen where skis with old fuel will lose a couple hundred rpms do to the exu pulling timing from bad fuel. I have also been out riding after it had rained and lost a couple hundred rpms. I could actualy feel it surging as I went through patches of fog. The other 2 skis that were with me noticed the same thing.

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