Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2005 Lexus GX 470FACTORY OEM SERVICE PROCEDURE
Fuel System (2UZ-FE): Precaution
- PRECAUTION
- Before working on the fuel system, disconnect the negative (-) terminal cable from the battery.
- Do not smoke or work near fire when working on the fuel system.
- Keep gasoline away from rubber or leather parts.
- WORK FOR PREVENT GASOLINE FROM SPILLING OUT CAUTION:
- Do not disconnect any part of the fuel system until you have discharged the fuel system pressure.
- Even after discharging the fuel pressure, place a shop rag or piece of cloth over fittings to prevent fuel splashing on yourself or in the engine compartment when separating the fittings.
- Remove the circuit opening relay from the engine room relay block.
- Start the engine. After the engine has stopped on its own, turn the ignition switch OFF.
HINT:
There is a case that DTC P0171 (system too lean) is output.
- Check that the engine does not start.
- Remove the fuel tank cap, and let the air out of the fuel tank.
- Disconnect the negative (-) terminal cable from the battery.
- Reinstall the circuit opening relay.
- FUEL SYSTEM
- When disconnecting the high fuel pressure line, a large amount of gasoline will spill out, so observe the following procedures:
- Disconnect the fuel pump tube. See REMOVAL & INSTALLATION AND DISASSEMBLY & REASSEMBLY
- Drain the fuel remained inside the fuel pump tube.
- Do not damage the disconnected pipe and connector, and prevent intrusion of foreign objects by covering them with a plastic bag.
- Place a container under the connection.
- When connecting the union bolt (fuel pressure pulsation damper) on the high pressure pipe union, observe the following procedures:
- Always use new gaskets.
- Tighten the union bolt by hand.
- Using SST, tighten the union bolt to the specified torque.
SST 09612-24014 (09617-24011)
Torque:
- 33 N.m (340 kgf.cm, 24 ft.lbf) for use with SST
- 39 N.m (400 kgf.cm, 29 ft.lbf)
HINT:
Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).
- Observe the following precautions when removing and installing the injectors:
- Never reuse the O-ring.
- When placing a new O-ring on the injector, do not damage the O-ring.
- Coat the new O-ring with spindle oil or gasoline before installing. Do not use engine oil, gear oil or brake fluid.
- Install the injector to the delivery pipe and lower intake manifold, as shown in the illustration.NOTE: Before installing the injector, apply spindle oil or gasoline where the delivery pipe or intake manifold contacts the O-ring of the injector.
- When disconnecting the high fuel pressure line, a large amount of gasoline will spill out, so observe the following procedures:
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
