Ford E7TZ-9C407-B Fuel Pump Assembly

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If it is necessary to remove mechanical fuel pump on carbureted models, unplug the battery cable and place drain pan under. To eliminate leakage, shut off the end of inlet pipe and line. Then remove four screws that connect fuel pump with gasket. Clean surfaces in contact with each other. For replacement, use new one covered with RTV sealant, oil rocker arm of fuel pump, set up pump and tighten bolts. Reconnect lines, reconnect battery cable and start engine checking for leaks on electric fuel pump installed externally for 1987-1989 fuel injected models. Relieve pressure from the fuel system and disconnect battery cables if it's a problem of electric fuel pumps which are mounted externally to frame rails on right side for 1990-1993 models inclusive. To locate them along the left-side frame rail, first identify fuel pumps by their specific appearances. Remove mounting bolts, disconnect electrical connectors and fuel lines before removing these pumps.

To remove the low-pressure pump in the fuel tank for 2.3L and 2.9L engines up to model year 1988, disconnect the negative battery cable, drain or remove the tank, disconnect electrical connections to the fuel system sender unit, remove dirt from around the fuel sender assembly, loosen quick connect fittings, and separate the locking ring, sender assembly, and sealing gasket. Install a fuel pump on the sender assembly, place a new sealing gasket into a groove of a tank, and install the sender assembly into it. Rotate this ring until it locks. For removal of high-pressure pump on the frame rail, disconnect negative battery cable, relieve system pressure, clean dirt/grease from fuel line fittings, disconnect quick-connect fittings properly, and pull out mounting bracket off the pump assembly. After cleaning and maintenance operations are done, reconnect electrical connections and fuel line connections, connect the battery cable, pressurize the fuel system, and check for leaks.

In F-series and Bronco, three types of electric fuel pump configurations are available, those for Hot Fuel carbureted 7.5L engines have an in-tank low-pressure fuel pump controlled by a relay connected to a fuel pump switch that is triggered by the engine oil pressure switch and powered through an inertia switch. There is a pre-1990 model with early EFI system that consists of an externally mounted high-pressure pump and a low-pressure in-tank pump regulated by the fuel rail pressure regulator. 1990 models and beyond have the FDM (fuel delivery module) that houses various components such as a high-pressure fuel pump, venturi jet pump, relief check valves, and shuttle selector valve.

Issues in the fuel pump can result in insufficient fuel delivery or a lean condition in the engine.

Operational checks for the fuel pump involve verifying pump operation during startup and continuous running, addressing issues through diagnostic procedures, circuit checks, and pump replacements as necessary.

Before installing a new fuel pump, ensure that all gasket material is removed from the mounting pad and pump flange. Apply oil-resistant sealer to both sides of a new gasket and position it on the pump flange.

The fuel pump is positioned on the left front side of the block or timing chain cover.

Remove the inlet line at the fuel pump and plug the end of the line to prevent leakage.