2017 Massimo msu500 efi no start
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By Kierobi
Have a MSU 500 that we got from my wife's uncle a while back. We've had it running and hauling around the property but it stopped a few months ago after what I thought was running out of gas and I'm just getting to looking into it.
Had fuel to the injector but nothing coming out the injector so swapped with new injector and installed inline filter in the supply hose from fuel pump. Tried again and still nothing but noticed this time that I can't hear the fuel pump priming.
Pulled off the electrical connection and I'm getting 12V to the fuel pump but it won't run. Put it on a test bench and got it to run so put test lamp between +ve and -ve terminals on the connector and nothing. Checked against the passenger seat securing post and get a light.
Tried chasing the wire back and think that the ground is through the ECU but not 100% sure. Can someone confirm for me? And if it is through the ECU, is the ECU just grounded against the frame or is it wired through to the battery?
Thanks in advance and hope this all make sense!
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By Eman85
I just purchased a Massimo MSU500 and no manual came with it so I have some questions. looking for part #'s and availability of basics like spark plug air and fuel filter. What is the valve adjustment specifications?
Is there a fuel drain? It's been sitting, low mileage but I want to drain out the old fuel and put fresh.
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By Butch
I have a AXIS 700 EFI Fuel pump pressure stays at 40 psi and when return line is blocked the pressure goes to 60 psi. and wll only run with return line closed.
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By Jeff freeman
I have a Coleman 550. Was having problems to start with where it would start and then shut off after a couple tries. It would take off and be good. It then got to a point where it would not start at all. I replaced the fuel injection twice the second time I replaced it I noticed a mouse or something had chewed one of the wires that connect the electrical to the fuel injector. . So two-part question first does anybody have a part number for that wire harness? Second, any other ideas after I fix the wire harness permanently on what could keep it from starting I have gas flow up to the fuel injector.
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By Eman85
Pulled fuel injector to see if I could clean it or if it's stuck open. Had a slide on clip that was really tough to get off. Don't see how the clip is supposed to lock into the plastic part that the injector slides into. Any videos or pics of injector replacement?
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