Lincoln AG9Z-9350-B Fuel Pump Assembly

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The fuel pump module which comprises the fuel pump, fuel level sending unit, fuel filter, and, in case of mechanical returnless pump, fuel pressure regulator is located at fuel tank and requires some disconnection and detachment of fuel tank on 2013 and later models. On electronic returnless pumps, fuel pressure is regulated by the Fuel Pump Control Module (FPCM) and the parts inside the module cannot be repaired individually. The all-wheel drive models are equipped with two fuel level sensors, one of which is mounted on the body panel below the driver's side of fuel tank and another one on the same place from the passenger's side. First of all, release the fuel system pressure and then, Ignition OFF, disconnect the negative battery terminal. Second, evacuate the rear seat cushion and the screws at the back that hold the fuel pump access cover. Pull off the electrical connector and the fuel supply line quick-connect fitting at the fuel pump module. Insert a hammer and brass punch and twist it in anti-clockwise direction, you may now remove fuel pump module from the fuel tank with caution while covering the fuel level sensor float arm. Check up the O-ring element, in case it is worn, it should be replaced and in case of installing the element, the process is reversed. For automobiles that have an electronic returnless fuel system, the FPCM situated in the left rear corner of the boot surveys the fuel pump module speed, output and the pressure. The FPCM is connected to the left rear trunk carpet trim, the electrical connector should be disconnected together with the other additional pin-type retainers to free and pull out the FPCM and in reassembling the components simply reverse the process of this removal.

The fuel pump module, comprising the fuel pump, fuel level sending unit, and fuel filter, can only have the fuel level sending unit serviced separately. On AWD models, there are two fuel level units, one on each side of the fuel tank. To remove the module, relieve fuel system pressure, disconnect the negative battery cable, remove the fuel tank and the pump module lock ring. The module is then pulled out, disconnecting the fuel vapor hose quick-connect fitting. Inspect and replace the O-ring if necessary. The installation is the reverse of removal. The fuel level sending unit is removed by pressing the locking tab and sliding it off the sensor. For AWD models, the fuel tank is removed to access the fuel level sensor, which is then pulled out. Inspect and replace the O-ring if needed. Installation is the reverse of removal.

Alternately loosen two nuts attaching the high-pressure fuel pump to the valve cover, one complete turn at a time, until removed.

Unscrew the lock ring using a pair of pliers.

Before installing the pump, check the pump tappet in the pump body for wear or damage.

Before removing the fuel pump insulator, the fuel injection pump electrical connector needs to be disconnected.

Before installing the fuel injection pump, the pump tappet should be checked for wear or damage.

To remove the fuel pump module, the fuel system pressure must be relieved and the negative battery cable disconnected. The fuel tank is then removed, followed by the removal of the pump module lock ring. The fuel pump module is carefully pulled out of the tank to disconnect the fuel vapor hose quick-connect fitting. The O-ring should be inspected and replaced if necessary.

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