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  1. #1

    Seadoo Gti 130hp upgrade to 155hk gone wrong rough idle need advice

    I do have an Seadoo Gti 130 2011 and after a while i wanted to upgrade the ski to 155 version and tune it to 170hp.

    Bought an oem used camsahft 420837851 and a set of injectors 420874834. After installing and tuning the ski did missfire and hesitate on idle.

    Did tuned it back to 130 stock file and the problem didnt disapere, so the main problem arent there i think.

    Did check the timing 3 times and is seems to be as before. A compression test is done and it shows almost 170 on all three cylinders.
    Then i did get the idea to open the rocker arm and empty the lifters due to more aggresive camshaft wich made the ski go very much better than before on the 130 stock file. So i did tuned it to 155hp file and it did run allmost perfect on idle. Did try the ski on a lake and there was a hesitation and after restart it do go rough on idle.

    So my question is it possible to tune it to 155hp or do i have to uppgrade the ecu?

    There arent any fault codes at all.

    Or have i done something wrong?

    Anyone that could give me some advise.


    Best regards Hasse Sweden.


  2. #2

    Join Date
    May 2015
    Location
    College Station, Tx
    Posts
    32
    i had similar issues mine ended up being a knock sensor the code took a while to show up though

  3. #3
    An update. I did restore the ski to stock and everything works perfect for now. So it was the tune. Maybe i will try another tuner next time. So much work for nothing..

  4. #4
    Quote Originally Posted by Hasse View Post
    An update. I did restore the ski to stock and everything works perfect for now. So it was the tune. Maybe i will try another tuner next time. So much work for nothing..
    What tune do you used?!or wich tuner?!
    Can you share the file for comparison?!

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