on the frame next to transmission. Need special tools. see auto parts guys. they can show you how to use it.
the fuel filter is located in two places one is directly in the base of your carb and the other is in your frame rail located about middle of the drivers side.
the fuel filter on a 1986 ford ranger is located on the inside of the frame on the drivers side in front of the gas tank.
top center of engine under/behind air filter housing
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.
On mine, it is located behind the passenger side headlight. You need to pull the headlight out to get to it.
likely on the frame rail below or just behind drivers seat
The fuel filter is located just below the drivers door on the frame rail. There are two clamps to pull the filter.
might be a clogged fuel filter or some kind of leak in your fuel lines allowing air in the system.
Clogged fuel filter, defective fuel pump are 2 possibilities.
Advanced Auto Parts Store
your waste gate stuck open or closed , clogged fuel filter, dirty air cleaner dirty injectors