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Losing power at fuel pump

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  • #16
    I'm leaning that the ECM is the issue and needs to be tested/repaired.

    Fun Times or muc have any thoughts?
    94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
    95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
    07 Seadoo GTX
    Merc Adults Only VP Adults Only
    G-Dad always said "First Liar doesn't stand a chance"

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    • #17
      Out of curiousity, if the ECM is the issue and not grounding the relay like it should be, would I be causing any damage if I just wired the pumps directly to a 12v constant and ran them with a toggle switch. I hate to drop $1,500 on a ECM just because it’s not sending a ground to a fuel pump relay. I’m still considering replacing the fuse box that was recalled by Volvo Penta for the specific reason of intermittent fuel pump shut off.

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      • #18
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        With all marine fuel pumps they need to be able to be turned OFF, if oil pressure is lost, when key is turned OFF and when kill switch is turned OFF

        The ECM does all these things and more. So if you were to wire it so these things will turn the pump OFF then maybe.

        I would not do it with a separate toggle switch, need to be safe.

        Call and talk to Bob at OBD Diagnostic and see if he can give you an opinion. They do repair them, and $80 to test and advise

        https://obd2allinone.com/ecmrepair.asp
        94 Formula 27PC Custom 509MPI MEFI3 , B3 XR
        95 Rinker 232 w/ 7.4L Carb 0F425011 B1 0F486471
        07 Seadoo GTX
        Merc Adults Only VP Adults Only
        G-Dad always said "First Liar doesn't stand a chance"

        Comment

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