Hi all, my buddy has a 1990 f350 with a 460 5 speed, dual tanks.

He keeps having an issue were the fuel slector switch doesnt work sometimes, the gauges arent accurate, sometimes he runs out of gas because the gauge isnt registering correctly.

Right now it wont run because of no fuel. I've had to go out and bleed his fuel rails a few times because of air in it. Sometimes when your out of the truck the fuel pump clicks on and pressurizes. No idea why it does that when the key is out.

Any help would be apprectiated. I think its the switch under the truck that changes tanks but thats my guess. thanks