Ford 2L2Z-9H307-HC Sender And Pump Assembly

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To replace the fuel pump and sending unit assembly, a special fuel line disconnect tool is needed, available at most auto part stores, or a tool installed about ten inches behind the fuel filter in some models. If the vehicle hasn't been driven enough to empty the tank, it's recommended to siphon out residual fuel before proceeding. Begin by relieving fuel pressure, disconnecting the battery, and raising and securely supporting the vehicle on jackstands. Remove the fuel tank, detach the fuel feed and return lines from the fuel pump module, and, depending on the model, tap the lock ring counterclockwise or remove the mounting bolts or plastic retaining ring. Lift the fuel pump/sending unit assembly from the tank, inspect the tank opening's O-ring, and replace if deteriorated. Remove the fuel pump mounting clamp bolt, disconnect the fuel pump's electrical connector and lower hose clamp, and remove the strainer for cleaning or replacement. Installation involves cleaning surfaces, applying grease to the new seal ring, positioning the O-ring, and guiding the assembly into the tank. Secure the assembly using the specified method (lock ring or mounting bolts) and complete the installation in reverse.

To perform a fuel pressure test, acquire a fuel pressure gauge and adapter set. Note that the fuel pump operates while the engine is cranking or running, receiving ignition reference pulses from the electronic ignition system; otherwise, it shuts off after two or three seconds. Following fuel pressure relief, covering fuel connections with a shop towel is advised. For a general electrical circuit check, listen at the fuel filler opening while an assistant turns the ignition key to the On position, expecting a whirring sound. If absent, check the fuel pump fuse, inspect the fuel pump relay and associated wiring, and ensure the inertia switch is functional. Verify voltage at the relay connector, then proceed to check for battery voltage at the fuel pump harness connector near the fuel tank. If voltage is present and the fuel pump still doesn't work, check for continuity to ground at the fuel pump harness connector, and if the ground is satisfactory, replace the fuel pump. For the operating pressure check, relieve fuel system pressure, attach a fuel pressure gauge to the test port, and start the engine. For 1998 and earlier models, check fuel pressure at idle, and if low, troubleshoot the vacuum signal to the fuel pressure regulator. For 1999 and later models, observe the fuel pump running for one or two seconds with the key in the ON position, and note the gauge reading. Depending on the pressure, diagnose potential issues such as fuel leaks, a clogged fuel filter, or a defective fuel pressure regulator. After starting the engine, monitor the gauge reading and check for fuel leaks. Turn off the engine and assess the hold pressure for five minutes, troubleshooting potential issues like leaking fuel delivery lines, injectors, a defective fuel pump, or a faulty fuel pressure regulator. Finally, relieve fuel pressure, disconnect the fuel pressure gauge, and start the engine to verify the absence of fuel leaks.