Okay, let's see if we can't get this one diagnosed and fixed.. When the truck starts does it blow any smoke...If so what color.
Does it start then die and then start up and run.....
May be the lift pump gone south. Try this test:
(thanks Pete)
Do a pressure and flow test of the fuel pump at the Schrader valve on the filter header (FSS- fuel shutoff solenoid disconnected on IP). Remove the tire valve core and hook a hose and pressure guage on it should see 4-6 psi when starter cranking engine over. Then do a fuel quantity test same place, should see 1/3 pint in 10 seconds of starter engine cranking, route fuel to a suitable container with a hose. When all finished hook up the FSS wire .
If it is the lift pump, and you get a new one be sure to follow the instructions for installation with the newer style "arm" as it can cause internal damage if not put in right.
What level is the fuel tank at? make sure the tank being used is at least 3/4 full..
Start with these tests and report back
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1994 F-350 7.3 IDI Turbo, crew cab, E4OD,4:10 L/S, LB, Dually
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1997 Jayco 323RKS fifth wheel w/2 slides, Air Lift 5000 bags
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