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  1. #1

    Join Date
    Jun 2005
    Location
    miami,fl
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    54

    76.4 got ecu /problem fixed thanks to this forum

    ive had my r r ecu unit for 8 months sitting in my garage bkuzz when bought it only ran 7650,but became member of this forum and started asking questions and the hulk recomended talking to mark wich i did
    he told me just to take of my knock sensor upgrade wich is a piggy back
    cable on the harness ,i did and what do you know 8350 to 8400 with sometimes jumping to 8450 ,ran 76.4 best run of the day but consistent
    75"s all day,rr ecu,rr intercooler ,10:1 pistons ,riva filter,riva scoopgrate
    solas in the box prop,next im getting prop repitch,thermostat,and rear exhaust,also 93 degrees, heat index 100,80%humidity im very happy thanks for all your help and input to greenhulk.net and all its members
    by the way smoked everyone on the lake


  2. #2
    Site Admin Green Hulk's Avatar
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    It seems like Rotax Racing would mention in their instruction for installing the Rotax Racing ECU that if you have an 04 model and have had the knock sensor update that you MUST remove the piggy back harness from the knock sensor. This would prevent LOTS of problems.

    Glad you found your problem Peter and nice numbers too!!!

  3. #3

    Join Date
    May 2005
    Location
    nc
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    11
    i have had the same problem with a 2004 rxp the rr ecu drops 200 rpm when i install it can you give me detailed instructions on how to fix the problem

  4. #4
    Site Admin Green Hulk's Avatar
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    Jack, did you have the knock sensor update done to your ski when it was still equipped with the stock ECU? If so you need to remove the piggy back harness off of the knock sensor connector.

    http://www.greenhulk.net/forum/viewtopic.php?t=245

  5. #5

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    May 2005
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    nc
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    11
    i am not aware if the update was done

  6. #6
    Site Admin Green Hulk's Avatar
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    Well, if you didn't bring it to your dealer to have the knock sensor update done then im sure it wasn't done therefore its not your problem.

  7. #7

    Join Date
    May 2005
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    nc
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    will the ecu help a stock engine that has ic,vortex wheel,exaust mod,cold air mod?

  8. #8
    Site Admin Green Hulk's Avatar
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    Yes, that is the level of modifications i was running when i initially purchased my ECU.

  9. #9

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    May 2005
    Location
    nc
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    11
    did the factory do any recalls in house in 2004 or could my dealer do it at the first service in 2004?

  10. #10
    Site Admin Green Hulk's Avatar
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    It is a distint possibility that your dealer did it in 04 before it was sold to you. An easy way to determine this is to check to make sure there isnt a piggy back harness plugged in between the main harness and knock sensor connector. See the link above for where its located and what it looks like. If it is in place remove it and plug the main harness directly into the knock sensor connector.

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