I believe that its some where in side the vehicle, and if not its inside the engine area
No , it's fuel injected
belt
right hand side of motor on bottom in front of transmission .
I think it is next to the starter solenoid close to the battery.
Could be bad gauge or float stuck in fuel tank
Aprox $500 parts and labor.
next to the driver side batter, a black and gray relay,is the fuel relay low volts will burn then up.or plug fuel filter..
In a Ford Econoline 350 box truck, the fuse for the fuel system is typically located in the fuse box under the dashboard on the driver's side or in the engine compartment. You can identify the specific fuse by consulting the owner's manual, which provides a diagram of the fuse box and indicates which fuse corresponds to the fuel pump or fuel system. If you're unable to locate the manual, a visual inspection of the fuses may be necessary to find the one labeled for the fuel system.
gap is 42
Try Autozone.com
7.3 liter diesel
No , the Ford Expedition is a full size Sport Utility Vehicle where the Econoline ( E-150 / E-250 / E-350 ) is a full size VAN