Repair 7

How Do I Change the Fuel Pump on a 1988 Ford F 250 Pickup

The Ford F-series is a line of full-size pickup trucks that has been in continuous production since 1948. The F designator indicates that the vehicle has an F-style body, and the 250 designator means that its a 3/4-ton pickup truck. The 1988 Ford F250 pickups have a variety of engines, usually an 8-cylinder 5.8L engine or an 8-cylinder 7.5L engine. All versions of the 1988 F250 use a low-pressure fuel pump mounted to the fuel tank.

Instructions

1

Disconnect the cable on the batterys negative terminal with a socket wrench, and loosen the filler cap on the fuel tank. Remove the valve cap for the fuel pressure relief valve on the fuel line. Connect pressure gauge T80L-9974-A to to the valve, and open the gauge to relieve the pressure in the fuel system. Remove the pressure gauge and replace the valve cap.

2

Siphon the fuel from the fuel tank into a gasoline container with a siphon hose. Disconnect the electrical wiring for the fuel gauge sending unit wire. Detach the fuel line and air relief tube from the fuel tank. Release the clamp for the filler neck on the fuel tank, and disconnect the filler neck. Remove the mounting nuts on the fuel tanks retaining strap, and remove the fuel tank from the vehicle.

3

Detach the electrical connector from the fuel pump assembly, and clean the surface of the fuel tank around the fuel pump assembly with a shop rag. Disconnect the fuel lines from the fuel pump assembly. Turn the locking ring on the fuel pump assembly counterclockwise with a wooden dowel and hammer, and remove the locking ring. Pull the fuel pump assembly out of the fuel tank, and discard the gasket on the fuel tank.

4

Install a new gasket into the groove on the fuel tank, and place the new fuel pump assembly into the fuel tank. Attach the locking ring to the fuel pump assembly, and turn it clockwise with the hammer and dowel until the locking ring stops against the retainer ring tab.

5

Connect the fuel lines and electrical connection to the fuel pump assembly. Install the fuel tank, and tighten the nuts on the fuel tanks retaining strap to 30 ft.-lbs. with a torque wrench. Fill the fuel tank with fuel, and connect the cable to the negative battery terminal.