Fuel Injector: Service and Repair
FUEL INJECTOR AND FUEL TUBE
Removal and Installation
CAUTION:
^ Apply new engine oil to parts before installing the parts, as shown above.
^ Do not remove or disassemble parts unless instructed as shown in the figure.
REMOVAL
1. Release the fuel pressure. Refer to FUEL PRESSURE RELEASE.
2. Remove the intake air duct.
3. Partially drain the engine coolant. Refer to DRAINING ENGINE COOLANT.
4. Remove the intake collector. Refer to INTAKE MANIFOLD.
5. Disconnect the fuel hose quick connector at the fuel tube side.
^ For how to disconnect and connect the quick connector, refer to INTAKE MANIFOLD.
CAUTION:
^ Prepare a container and cloth for catching any spilled fuel.
^ This operation should be performed in a place that is free from any open flames.
^ While hoses are disconnected seal their openings with vinyl bag or similar material to prevent foreign material from entering them.
6. Disconnect sub-harness for injector at engine front side. and remove it from bracket.
7. Loosen the fuel tube bolts in the order shown, then remove fuel tube and fuel injectors as an assembly.
8. Remove the fuel injectors from the fuel tube.
a. Release the clip and remove the fuel injector.
b. Pull fuel injector straight out of the fuel tube.
CAUTION:
^ Be careful not to damage the nozzle.
^ Avoid any impact, such as dropping the fuel injector.
^ Do not disassemble or adjust the fuel injector.
INSTALLATION
1. Install new O-rings on the fuel injector.
NOTE: Lubricate the O-rings lightly with new engine oil.
CAUTION: Be careful not to scratch it during installation. Also be careful not to twist or stretch the O-ring. If the O-ring was stretched while it is attached. do not insert it into the fuel tube immediately.
2. Install the fuel injector into the fuel tube with the following procedure:
^ Do not reuse the clip, replace it with a new one.
^ Insert the new clip into the clip mounting groove on fuel injector.
^ Insert the clip so that the projection on Lug A of fuel injector matches notch A of the clip.
3. Insert fuel injector into fuel tube with clip attached.
^ Insert it while matching it to the axial center.
^ Insert fuel injector so that the projection on Lug B of fuel injector matches notch B of the clip.
^ Make sure that fuel tube flange is securely fixed in flange fixing groove on the clip.
^ Make sure that installation is complete by checking that fuel injector does not rotate or come off.
4. Install fuel tube assembly.
a. Insert the tip of each fuel injector into intake manifold.
b. Tighten the fuel tube bolts in two steps in the numerical order shown.
Step 1: 12 - 13 Nm (1.2 - 1.4 kg-m, 105 - 121 inch lbs.)
Step 2: 17 - 23 Nm (1.7 - 2.4 kg-m, 13 - 17 ft. lbs.)
CAUTION: After properly connecting fuel tube assembly to injector and fuel hose, check connection for fuel leakage.
5. Connect the fuel hose quick connector. Refer to INTAKE MANIFOLD.
6. Install the intake collector. Refer to INTAKE MANIFOLD.
7. Installation of the remaining components is in reverse order of removal.
INSPECTION AFTER INSTALLATION
Make sure there is no fuel leakage at connections as follows:
1. Apply fuel pressure to fuel lines by turning ignition switch ON (with engine stopped). Then check for fuel leaks at connections.
2. Start the engine and rev it up and check for fuel leaks at connections.
NOTE: Use mirrors for checking on connections out of the direct line of sight.
CAUTION:
Do not touch engine immediately after stopping as engine is extremely hot.
^ Perform procedures for Throttle Valve Closed Position Learning after finishing repairs. Refer to EC-748, Throttle Valve Closed Position Learning. Throttle Valve Closed Position Learning
^ If electric throttle control actuator is replaced, perform procedures for Idle Air Volume Learning after finishing repairs. Refer to EC-749, Idle Air Volume Learning. Idle Air Volume Learning