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Recently on a trip to lake powell in 106 degree weather, we experienced boat issues on our 2016 G23 with ppm h6 engine. Started when we went for a cruise for 30 minutes at planing speed, shut the boat off, went for a hike and 2 hours came back and the boat would crank but not start. Error code that tripped was DTC3104 inlet metering valve imv loop open or short to ground. we were able to wiggle the relays around and got the boat started. upon further inspection, we noticed the ignition relay and socket underneath and the output wires had melt damage. cleaned the contacts of melted plastic and were able to run again. made several calls to mechanics who recommended fuel pump changes. arranged change of both high and low pressure pumps and fuel cell change out. problem returned again. the high power side of the relay was failing closed instead of normally open position. spare relays kept us going along with pulling the relay out after each surf session. seemed to be totally heat related. now mechanics suggest just changing wire harness for $2k. not convinced this will solve problem. Anyone else have similar experiences??
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Did you ever get this figured out? I have experienced the same issue, but only one time. My theory is that my batteries are old and I have an aftermarket stereo that draws the voltage down even when driving (alternator is not keeping up with current demand). Ohms law states that as voltage drops current goes up. So the current to the fuel pump is rising because my stereo is drawing the voltage down on the electrical system, which causes the relay to overheat. My question to you is, 1) are your batterys orginal 6 year old+ batteries? 2) do you have any electrical modifications (like stereo)? The night that this happened to me, we had all the lights on as well which would have compounded the situation.
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