problems running the front tank on a dual tank 97 F250 HD
I have changed the fuel pump in the front tank twice. I don't believe the fuel pump itself is the problem. Just after putting the pump in I started the truck and it ran fine. After shutting it off and it sitting for a couple of hours it wouldn't start. Switched to the rear tank and it fired up. Drove down the road and switched back to the front tank, it took about 10 seconds and the front pump started working. Now the front tank doesn't work. I can hear the fuel pump running when the key is on but no fuel to the engine. The relay has been changed, the 20 amp fuse is fine. There is no fuel selector valve that I can see on this truck. I've followed the fuel lines and they do not go to any box or valve. They go to the top of the back of the engine.