Quote:
Originally Posted by jimbo2013
Let the rig sit for several months, tried starting turns over great but will not start.
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I had **exactly** the same no-start symptoms with my ‘95 Monaco Dynasty’s c8.3. after receiving feedback in the Monaco owner forum I narrowed it down to the fuel cutoff solenoid.
I am new to diesels so learned that on my Cummins when the ignition is turned to the start position one of the two magnets in the solenoid pulls UP and allows fuel to pass to the engine; the other magnet HOLDS the solenoid in the run position.
on my Cummins the solenoid receives power from a relay (on top of the starter) via a 3 wire harness:
black wire is ground
red wire is the “run” position
white wire is the “pulls up” position
I can’t say if you’ve got a cutoff solenoid issue like mine, but here’s how I tested and id’d the problem.
with my ignition in the “on” position I go to the engine compartment, place the engine in rear start position, then reach in to the solenoid and push the solenoid arm to the “up” position ... if the “run” wire is energized you should feel it pull UP and HOLD in the “run” position.
when I engage mine in the rear start position it fires right up and runs like a champ ... YMMV ;-)
i replaced my solenoid and while it manually pulls up, starts and runs like a champ I have yet to locate the gremlin in my wires ... but I will.
there are sooo many potential issues / reasons as noted I can’t suggest where to begin ... but this is what I did.
post updates as you rinse through things ... it helps us learn.