RE: Dual Fuel Tank Switching on 1991 E350 clubwagon
The part your refering to does not really switch tanks. It is really nothing more than a valve that operates from the pressure from the tank mounted fuel pumps. Basically, it keeps one tank from filling the other. Thats what mine did when the valve stuck halfway thru switching.There are no wires or vacume valves. I did away with all the fuel injection and changed over to a carb. Mounted two electric fuel pumps, one for each tank.
91 E-150 Van