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yamaha hpdi 250 fuel pressure problem

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  • yamaha hpdi 250 fuel pressure problem

    I have a yamaha 250 hpdi that dont start , yds sends a code 25 fuel pressure sensor and puts in red about 1500 lbs of pressure, any idea why.

  • #2
    1500PSI sounds a bit high, cant remember the exact spec but its something about 1100 PSI.
    you could have a regulator failure or the injectors are not opening.

    have you checked spark?
    ?

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    • #3
      this is the yds screen , i change all the inyector from a working motor and is the same , check the spark and is ok replace the mystery filters in the hp pump and is the same, is there other filter in the hp pump?, the first time i start the motor before 1 year stored it was ok but it becomes making so much smoke and then didnt start again, change new gas and cleaned the vst filter and the strainer , tanks rodbolt17 i really apreciate your help
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