Only explanation I can think of is that air gets into the fuel line. Motorhome has 80-gallon flat-bottom tank with outlet near front right corner. About when turn is completed, engine dies. After waiting from 1hr to 1.5 days, usually starts with no trouble. At other times I crank and crank, recharge batteries, crank and crank again, recharge, etc., eventually will start.

Once, after restarting, I let a little air in by loosening the line at the rear fuel filter. Sure enough, it killed the engine, but it ran for a minute or two before killing. Line from fuel tank to LP is about 20 feet. So why does it kill almost instantly after making a hard right turn instead of killing after a minute or two?

I'm rigging up an auxiliary fuel tank using 5-gal diesel jerry container with two hoses, one leading to the LP and one to the return line. If it still kills on hard right turns, problem is something weird.

Assuming problem is air getting into line at fuel tank hose connection, is there some device that will remove air from line? I've been thinking of making a 1-gallon tank with upper and lower hose connections, like a coolant recovery tank. The upper one would be connected to the fuel line on the tank side, the lower one to the LP. As long as there would be fuel in that tank, the LP would not draw air.

 

Any way to tilt the fuel tank towards the pickup?? depending on the length even a 1/4 inch would help a bunch IMO and depending on where you live and where the truck came from but a lot years and a lot of salt wreaks havoc on metal fuel lines and brake lines and even the tiniest of air leaks in any Diesel is a bad thing And a electric LP would greatly improve the output of the mechanical pump