in the tank.
1994 is 55 gals
top center of engine under/behind air filter housing
On a 1995 Ford Explorer : The fuel filter is underneath the vehicle , below the drivers door , mounted on the frame rail
On a 2001 Ford E350 with a 7.3L diesel engine, the fuel filter is located on the driver's side frame rail, just before the fuel tank. It's typically mounted in a vertical position and can be accessed from under the vehicle. Make sure to relieve the fuel system pressure before attempting to change the filter to avoid spills.
Try under drivers side on the chasis.
On my 1989 E350 motorhome, I had a weak fuel pump near the fuel filter. I replaced that and the problem went away. The pump in the tank was fine.
likely on the frame rail below or just behind drivers seat
Look under vehicle - follow the fuel line
your waste gate stuck open or closed , clogged fuel filter, dirty air cleaner dirty injectors
year? engine? 1995 5.9 v8
Remove the engine cover it