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5.0 GXi-b…

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KPotter44

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Boat won’t stay running. Cranks and fires, but immediately dies. Tried applying some throttle. Still won’t stay running. Seems like the fuel pumps are activating when I turn on the key, but not getting any pressure on the high side. Don’t have the adapter to check the low side. Been talking with a lot of people and everyone has some suggestions as to what to check. One guy said it might be the oil pressure switch. Seems like something is telling it not to start. Any suggestions?
 
the oil pressure switch controlling the fuel pump is one approach used on the carb'd engines using electric fuel pumps...

Pretty certain you have an ecu overseeing the EFI functions....I'd start by scanning it and seeing what it sees and then go from there.

If the boat has seen decent use, it won't hurt to swap out the fuel pump relay as a first step.
 
I did switch the fuel pump relay with the spare in the fuse box. Ideally it would have been nice to get someone to come to my location, but that was not an option. Got it off the lift, towed to the ramp, and on the trailer. The shop won’t be able to look at it until Monday. Thanks for the reply.
 
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