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  1. #1

    1100 STX DI power issue please help

    Hi everyone

    I am new to the forum I have a 2000 1100 STX DI

    I took it out on the last week it would only rev to 4000
    Rpm and barely do 22 mph. After about 10-15 minutes of riding
    The motor started sputtering and she would only do 7 mph
    Also The check engine light came on.

    Yesterday I hook the jetski up to the hose and she would
    Rev up to 8000 rpm so after that I go take
    Her back to the lake and the exact same thing
    That happened last week happened again.

    What could be causing this?

    Thanks,
    Andy


  2. #2
    On DI, you need to hook up to KDIAG/pc and check what kind of error codes are stored in the ECU (aka EMM). Otherwise you will be swapping out parts like a shot-gun repair.

  3. #3
    water in the fuel tank will cause all kinds of problems and will def kill the fuel pump and injectors.

  4. #4
    Quote Originally Posted by 123456 View Post
    water in the fuel tank will cause all kinds of problems and will def kill the fuel pump and injectors.
    It is true that water in fuel will cause lots of problems but it will NOT cause the Check Engine light to come on the DI FICHT engine.

  5. #5
    Quote Originally Posted by meangreenman View Post
    It is true that water in fuel will cause lots of problems but it will NOT cause the Check Engine light to come on the DI FICHT engine.
    incorrect !

    "Priority level A" , Code: 59 = Fuel pump driver overheat, Check Engine light on, initiates slow mode = No.

  6. #6
    Quote Originally Posted by 123456 View Post
    incorrect !
    "Priority level A" , Code: 59 = Fuel pump driver overheat, Check Engine light on, initiates slow mode = No.
    WRONG!!!
    When was last time you worked on a bad EMM?

    Water in fuel tank will ONLY cause poor running.
    It will not make the fuel pump run hot and cause the EMM driver chip to overheat.
    You are just copying the info from the page 2-35 of the service manual.
    I am speaking from my own working experience with 100's of bad EMM over 10 years.



    Water in fuel tank does NOT cause the error code 59.





    Do you even know which one is the fuel pump driver chip on the EMM circuit?

    Bad EMM needs to be hooked up the KDIAG and see what the error code is if there is any.
    That's the very first step.

    Assumuption is a mother of all mistakes.

  7. #7
    Whatever Mr. Copy and Paste man, the internet if full of photos isnt it ? pic 2 is of what ? an Injector Driver.

    go back to ya toy box now !

  8. #8

    Join Date
    Jun 2011
    Location
    Dallas, TX
    Posts
    36
    Meangreenman , seems like that you have lots of experience on these EMM modules. So I have couple questions for you. If this is a flaw design, is it worth it to get it repaired? in other word, how reliable is it after repair? do they just repair it or fix the flaw? if I order a new one from dealer, is it gonna be the same design?

    Thanks,

    Quote Originally Posted by meangreenman View Post
    WRONG!!!
    When was last time you worked on a bad EMM?

    Water in fuel tank will ONLY cause poor running.
    It will not make the fuel pump run hot and cause the EMM driver chip to overheat.
    You are just copying the info from the page 2-35 of the service manual.
    I am speaking from my own working experience with 100's of bad EMM over 10 years.



    Water in fuel tank does NOT cause the error code 59.





    Do you even know which one is the fuel pump driver chip on the EMM circuit?

    Bad EMM needs to be hooked up the KDIAG and see what the error code is if there is any.
    That's the very first step.

    Assumuption is a mother of all mistakes.

  9. #9
    Quote Originally Posted by 123456 View Post
    Whatever Mr. Copy and Paste man, the internet if full of photos isnt it ? pic 2 is of what ? an Injector Driver.
    You are WRONG again.
    Pics are not from internet. They are from my camera.
    What wrong statement will you be making next?

  10. #10
    Quote Originally Posted by haikhanhjr View Post
    I have couple questions for you.
    > If this is a flaw design, is it worth it to get it repaired?
    > how reliable is it after repair?
    > do they just repair it or fix the flaw?
    > if I order a new one from dealer, is it gonna be the same design?
    That's quite more than a couple questions, but let me try answering.

    > I'm not a a circuit designer so I can't say whether there is a design flaw or not. But a common sense is telling me that cooling system is extremely critical on the circuit board (EMM) with three 17-amp injector driver chips. Even if you get the EMM repaired, if your ski's cooling system has some kind of problem, the repaired EMM won't last long.

    > EMM reliability mainly depends on the cooling system of your ski.

    > EMM repairing shop (ie DFI) only replaces what's burnt out or broken. They are just a part replacer, not a circuit designer.

    > A new EMM from dealer will have the same design as your original.

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