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  1. #11
    PWCToday Newbie ripcuda's Avatar
    Join Date
    Jun 2011
    Spokane, WA

    Re: Polaris MSX 150 - IFB

    The System Interface Box (SIFB) is a mushroom shaped module that plugs into the wire harness above the battery... below the ECU. If you're having starting/stopping or rev limiting at 3400rpms... this is the likely culprit.

    Join all the MSX 150 owners over at Green Hulk.


  2. #12
    Frequent Poster
    Join Date
    Aug 2010
    Port Clinton, Ohio

    Re: Polaris MSX 150 - IFB

    Found it. Thanks. I am working on this ski for a friend. He said he was flying along at 62 mph, made a turn and it bogged down and went into safe mode. He has to limp it back to the dock. I cleaned the MAP sensors even though they looked like new. The ski only has 114 hours on it. Not sure what else to try.
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  3. #13
    PWCToday Newbie
    Join Date
    Jun 2016
    chatham, la
    Blog Entries

    Re: Polaris MSX 150 - IFB

    I have a polaris 04 150msx turbo and tried the jumper white /blue to purple and tried to run the ski. come out of hole good but will not get above 4500 rpms and check engine light come on. I'm at wits end. Any help out there? Do you remove the module or leave it out. I left mine out and in but same thing happens.
    Last edited by caneylake; 07-04-2016 at 01:04 PM. Reason: left out questions

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