Fuel System
SFI SYSTEMPRECAUTION
1. BEFORE WORKING ON FUEL SYSTEM, DISCONNECT NEGATIVE (-) TERMINAL CABLE FROM BATTERY
HINT: Any diagnostic trouble code retained by the computer will be erased when the negative (-) terminal cable is removed from the battery.
Therefore, if necessary, read the diagnosis before removing the negative (-) terminal cable from the battery.
2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME WHEN WORKING ON THE FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR LEATHER PARTS
4. FUEL SYSTEM
a. When disconnecting the high fuel pressure line, a large amount of gasoline will spill out, so observe these procedures:
1. Disconnect the fuel pump connector.
2. Start the engine. After the engine has stopped on its own, turn the ignition switch OFF.
3. Put a container under the connection.
4. Slowly loosen the connection.
5. Disconnect the connection.
6. Plug the connection with a rubber plug.
7. Reconnect the fuel pump connector.
b. When connecting the union bolt (fuel pressure pulsation damper) on the high pressure pipe union, observe these procedures:
1. Always use 2 new gaskets.
2. Tighten the union bolt by hand.
3. 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.).
c. When connecting the flare nut on the high pressure pipe union, observe these procedures:
1. Apply a light coat of engine oil to the flare nut, and tighten the flare nut by hand.
2. Using SST, tighten the flare nut to the specified torque.
SST 09023 - 12700
NOTE: Do not rotate the fuel main tube, when tightening the flare nut.
Torque: 35 N.m (360 kgf.cm, 26 ft.lbf) for use with SST
HINT: Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).
d. Observe these precautions when removing and installing the injectors.
1. Never reuse the O-ring.
2. When placing a new O-ring on the injector, take care not to damage it in any way.
3. Coat a new O-ring with spindle oil or gasoline before installing-never use engine, gear or brake oil.
e. Install the injector to the delivery pipe and lower intake manifold as shown in the illustration.
Before installing the injector, must apply spindle oil or gasoline on the place where a delivery pipe or an intake manifold touches an O-ring of the injector.
f. Observe these precautions when handling nylon tube.
1. Pay attention not to turn the connected part of the nylon tube and the quick connector with force when connecting them.
2. Pay attention not to kink the nylon tube.
3. Do not remove the EPDM protector on the outside of the nylon tube.
4. Must not close the piping with the nylon tube by bending it.
g. Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.
1. Connect a LEXUS hand-held tester or OBD II scan tool to the DLC3.
2. Turn the ignition switch ON and push the LEXUS hand-held tester or OBD II scan tool main switch ON.
NOTE: Do not start the engine.
3. Select the active test mode on the LEXUS hand-held tester or OBD II scan tool.
4. Please refer to the LEXUS hand-held tester or OBD II scan tool operator's manual for further details.
5. If you have no LEXUS hand-held tester or OBD II scan tool, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector.
6. Pinch the fuel inlet hose.
The pressure in the high pressure line will rise to approx. 392 kPa (4 kgf/sq.cm, 57 psi). In this state, check to see that there are no leaks from any part of the fuel system.
NOTE: Always pinch the hose, Avoid bending as may cause the hose to crack.
7. Turn the ignition switch OFF.
8. Disconnect the LEXUS hand-held tester or OBD II scan tool from the DLC3.