Lexus 23220-0A050 Fuel Pump Assembly W/Filter

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First of all, to replace the fuel pump, relieve the fuel system pressure, disconnect the battery, remove the intake manifold, undo the electrical connector attached to the high-pressure fuel pump, and remove the wiring harness bracket, and the fuel line. Use a wrench to remove the high-pressure tube, but when you are loosening the bolts, take caution due to the intense pressure. Then, remove the lifter guide, the spacer gasket, and the O-ring. For the installation process, mount an O-ring onto the pump and rotate the crankshaft to the proper position. Then, install the lifter and guide it into the housing, align the key to the groove, install the spacer gasket and lifter guide to the valve cover, and line up the fuel pump bolt holes. Also, before fully tightening the high-pressure fuel pump bolts they should be tightened by hand, and install the high-pressure fuel tube. Finally, you can tighten the high-pressure fuel pump mounting bolts and the fuel tube nuts to the proper torque.

Remove the retaining bolts on 2006 and earlier models, or remove the retaining ring on 2007 and later models using a special tool. Carefully lift the assembly, angling it to protect the fuel inlet strainer and the sending unit float.

The options are to replace the entire assembly or disassemble it and replace specific components such as the fuel inlet strainer, fuel pressure regulator, fuel return jet tube, fuel pump, fuel filter, or fuel level sending unit.

Remove the engine cover and unscrew the banjo bolt securing the crossover line to the front fuel rail. Screw the adapter into the rail and connect the fuel pressure test hose.

If voltage is present at the fuel pump connector, the pump is defective. If there is no voltage, the PCM may be faulty.

After removing the high-pressure fuel pump mounting bolts, the fuel pump lifter guide should be removed and inspected for wear.

The remainder of installation is the reverse of removal.

To begin, remove the sending unit assembly from the fuel tank and drain any remaining gasoline from the pump/sending unit. Place the pump/sending unit on a clean workbench in a well-ventilated area. For 2007 and earlier models (except the 2007 RX 350), carefully pry off the end cap from the lower end of the fuel pump/sending unit assembly and remove the rubber insulator from the lower end of the fuel pump. Then, remove the fuel pump inlet strainer by disengaging the locking tabs with a pair of screwdrivers. Disconnect the fuel pressure regulator from the fuel return jet tube hose and fuel filter, and remove the fuel return jet tube assembly by pulling it out of the retainer clip. Disconnect the fuel pump electrical connector and remove the fuel pump from the fuel filter assembly. Separate the fuel filter housing from the upper part of the fuel pump assembly by disengaging the four locking tabs. Detach the fuel level sending unit from the upper part of the fuel pump assembly by disengaging the locking tangs from the lugs on the upper part of the pump.