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loss of high fuel pressure on a bf40 after short run

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  • loss of high fuel pressure on a bf40 after short run

    I have a bf40 fuel injected motor that runs for about 2 or 3 minutes perfectly and then drops fuel pressure. I have replaced the high pressure pump and it still does the same thing after setting for a while it will again repeat the same process any ideas
    Last edited by millermarine; 06-07-2018, 01:27 PM.

  • #2
    I forgot to mention that when it looses pressure it will not run or restart.

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    • #3
      Have you looked at fuel primer bulb to see if it is sucked flat, if so you have a fuel restriction in fuel tank or hoses. Have you tried pumping fuel primer bulb to see if can keep engine running when pumping? May have a bad low pressure fuel pump or bad fuel hoses. May have a problem with fuel pressure regulator, low battery voltage can cause it to shut off, load test battery and battery cables, check main relay.
      Regards
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