I recently drove my 2004 Safari Panther until the gauge was showing 1/8". (Travelling in NE British Columbia, pumps at planned stop were down.) Hot day for that part of the world, temps 85-90F. Reached truck stop and filled up. Then, engine (Cat C12) would not start. Turned over but would not fire. Tried bleeding water separator (no air, fuel clean), removed all power in an effort to reset ECM if that was the problem, all to no avail. It was getting late so pulled the unit away from the pumps. Next day changed both fuel filters and primed. Old filters were clean. ECM was throwing 2 codes - one for idle shutdown, which happens when I leave it idling too long; and one for low ECM battery - I had had to boost it about 2 months previously. Ended up loading it up and hauling it 300 miles to the Kenworth dealership near my home. It sat in their yard for a week; they towed it into a bay, and it started up on second attempt without doing anything to it. They spent 2 days trying to figure out what the failure might of been, came up empty. Fuel pressure good, grounds good, ECM wiring good, etc. Tough to diagnose something that refuses to fail. After reading Old Dog's post I'm starting to wonder if hot fuel may have triggered my problem.