So what have you done? Did you check to see if its the gas jellied in the tank?
If it is the fuel pump failing a used replacement should be cheap enough. You want it to come from a truck with the same style pump as new as possible that was wrecked while driving.
If you can fill it at least that might help melt down any old jellied gas. Maybe add some additive which is mainly alcohol to help the stuff dissolve. Of course those are jury rigged type fixes until you can afford to do the right thing which is get a look inside that tank and test the pump. Edit I don't know if anyone mentioned it but the wire harness on these can go wonky. Once you buddy helps you lift the bed try giving them a wiggle if the pump cuts out on you just to rule them out.

 

Okay thanks and i will check that wire splice thing.........after the truck sat for 2 hours, i went out there and it started right up. I gunned it twice and turned it off. weird

 

Checking the splice under the relay box is a good idea but I was referring to the harness branch with 3 or 4 wires in it that runs back to the pump itself.
I have read that some people had to run a new power wire to make the pump run.

 

I'd say it's time to do a pressure check. Pump may be running, but leaking enough internally that you don't get pressure built up enough.

Is that 91 a Magnum (mpfi) or a LA (TBI)?

RwP

 

Hey Ralph; i think my 6cyl. 5speed 91 is the 'EFI'. It's def not the magnum

 

Oh yeah, i get it; thanks. when my buddy can finally get over here, he'll know where those wires are and he'll have a fuel pressure gauge.....

 

Your "cough" sounds like my "bucking" symptoms!

 

Hey yeah; i say lurch but yes it's like that! did you sort yours out?

 

If it's not the Magnum, it's the LA and is throttle body injected; if it's fully fuel injected (with six injectors), it's the Magnum.

RwP

 

hm okay; good to know.