I have an 81 GMC with a pretty fresh crate 350. I was driving and my truck died. I thought it was out of gas (gm gauges) so I put 5 gallons in each tank just to make sure (I was switching it while it died but the other tank was empty.) I primed the carb and it fired but then died. We checked the fuel pump and it wasn't pumping. I replaced it and there was still nothing going to the carb. I blew through the tube going to the tank and it was clear. Does anybody have any idea what it could be?
<font face="Comic Sans MS">It takes a long while usually for fuel to go from the tank to the pump and then to the carb. At least if you have a mechanical pump it does. With an electric, you should be getting fuel almost instantly. Check the connections and hoses/lines for holes in them that the suction from the pump could dissipate through. Poke a hole in a drinking straw and see how quick the fluid goes up into your mouth from the container... Same theory with the fuel pump/delivery system... Good luck...</font>
My switching valve went out on me. It got stuck closed period. neither side worked. This might have been what burned out my fuel pumps. I now run a straight line from the right tank only because i am too cheep to buy a new valve.
pics of the V30 which is still for sale or possible trade.