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mpi eabc boost bacwards

Discussion in '4 Stroke Turbos/Supercharger' started by madsledder, Dec 31, 2016.

  1. madsledder

    madsledder Extreme

    Messages:
    89
    Location:
    Creston B.C.
    Bought sled new last year at the end of the season. 2015 viper mtx 190 Yamaha acc turbo kit installed by dealer. Not a lot of snow to play with last year so now that I'm riding this is what ive noticed. Boost seems to be high at 2000' 7psi was more I dropped it. And lowers as I go up in altitude 5psi at 6000'. Also it seems to run crappy after it is warmed up and sits for a bit. After I run it for a bit it clears up maybe 1/2 km down the raod. Temps outside were cold probably -10. I have looked and all plumbing seems to be ok.
     
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  3. madsledder

    madsledder Extreme

    Messages:
    89
    Location:
    Creston B.C.
    I have removed the eabc and solenoid and will go out maybe tomorrow. Could a faulty map senser cause this? Solenoid seems fine. So question is eabc or map senser?
     
  4. madsledder

    madsledder Extreme

    Messages:
    89
    Location:
    Creston B.C.
    After talking to mpi today sending all electronics in to be checked.
     
  5. madsledder

    madsledder Extreme

    Messages:
    89
    Location:
    Creston B.C.
    All my stuff is on its way back to me. But every thing tested good. Hopefully it was just a poor conection. He did mention that some have a flash in the ecu that keeps the #1 injector on. Any body know about this? Going to find out if they flashed the sled before I picked it up.
     
  6. madsledder

    madsledder Extreme

    Messages:
    89
    Location:
    Creston B.C.
    Well still having the issue. All the electronics were tested and ok. I found a boost leak and it is fixed. Still can not figure out why it is boosting too much at low altitude and not boosting enough at high altitude. Will run 8 psi at 2000' and 5 psi at 5700'. MPI has no idea why they are trying to figure out as well. But any other suggestions would be great.
     
  7. madsledder

    madsledder Extreme

    Messages:
    89
    Location:
    Creston B.C.
    Just in case any one is wandering or for future reference. It was the map sensor. A little annoyed because did this from new and mpi said no warranty on map sensor.
     
    Snowmixer likes this.

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