Just seeing a bunch of these propane trucks now. Have some with intermittent issues cutting out or misfiring. Had one that ran bad with spark advance hooked up. Guessed right the "pick-up" coil was bad, wires breaking down when advance pulled on them. New pick up coil fixed it. Have another with stall, no start. Caught it once where there was no neg at fuel cut out relay. Grounded it to get the truck started and it ran after that. I'm just not clear on what gives it the Neg...ECM after a tach signal from coil?
A manual would be nice but they are hard to get...