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  1. #1
    simmy's Avatar
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    May 2011
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    polaris msx 150 warning light flashing

    hi,i have just fitted my msx 150 engine due to fitting new oil cooler,
    piped up,charged battery,filled fluids,[oil,coolant,]
    the dreaded CHECK ENGINE IS DISPLAYED ALONG WITH THE FLASHING RED WARNING LIGHT,
    could this be because it may be air-locked in coolant?
    engine as been out,so every sensor as been disconnected,
    just had it running in short 10-20 second bursts on trailer with hose piped to flush connector,
    may run fine once in lake,
    just to let you guys know the ski run like a trooper on steroids before i removed the engine,
    so it could just be due to being removed/re-fitted,,
    any help guys would be awsome!!!


  2. #2
    Kosh's Avatar
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    Bugger, Because no one has a diagnostic unit it is a matter of working your way through each sensor. The only help is if another symbol is flashing as well - low fuel, temp, battery. Check you plugged everthing back in and that they are making good contact. both earth wires on.
    Nothing to do with an air lock unless the temp light is flashing as well.

  3. #3
    simmy's Avatar
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    hi kosh,yes the temp light is flashing,
    its gota be a air lock,
    dont wana run it to long on trailer as i cooked my turbo temp sender last time
    so ill be giving her a run this easter weekend,

  4. #4

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    Remember,
    There is a method to the Rpm limiter function on the MSX ECU. If you are limited to 5200 rpm, 6400 Rpm, etc this indicates where your problem might be. If there is air trapped in the coolant system, you can crack open the water jacket fittings on the cylinder head and purge the air. Be careful while doing this, as you dont want to build too much heat. If you think your engine is hitting the temp limiter, you shold be able to disconnect the wire the is connected to the temp sender in the exhaust manifold and run it to ground for a 30 second test.

    Maybe somebody with a good running 150 can verify this;
    #1 Do a test run and check peak Rpm
    #2 Disconnect the sensor and make a Rpm run; it should limit Rpm
    #3 Stuff a paper clip, etc into the connector and ground it to the block, the Rpm should come back.

    Another thing you can try:
    If you have an error code; try pulling the main fuse (brown) while the engine is running. This MIGHT clear the error code.
    But the only correct way to delete all the codes in the memory is with the diagnostics software, Precision Sports is a good source also for this.

    Regards,
    Randy

  5. #5
    simmy's Avatar
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    May 2011
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    cheers randy,
    ill keep you posted,
    am just having a issue with my jetpump,
    so i wont be out for 2 weeks,
    cheers pal

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