Fuel Injector: Service and Repair

REMOVAL AND INSTALLATION
1. Release fuel pressure to zero.







2. Drain coolant by removing drain plugs from both sides of cylinder block.
3. Separate ASCD and accelerator control wire from intake manifold collector.




4. Remove intake manifold collector from engine. The following parts should be disconnected or removed.
a. Harness connectors for
- IACV-AAC valve
- IACV-FICD solenoid valve
- Throttle position sensor and closed throttle position switch assembly
- EGRC-solenoid valve
- EGR temperature sensor
- Ground harness
b. PCV valve ventilation hoses
c. Vacuum hoses for
- Brake booster
- EGRC-solenoid valve
- Fuel pressure regulator
- EVAP canister
- EGRC-BPT valve
d. Air hoses from
- Air duct
- IACV-AAC valve
e. Water hoses for
- Throttle body
- Air relief plug
f. EVAP canister purge hose
g. EGR flare tube
5. Remove injector fuel tube assembly.
The following parts should be disconnected or removed.
- Vacuum hose for fuel pressure regulator
- Fuel feed and return hose
- All injectors harness connectors
- Push injector tail piece.
- Do not pull on connector.
- Do not extract injector by pinching.
6. Push out any malfunctioning injector from injector fuel tube.
7. Replace or clean injector as necessary.
- Always replace O-rings with new ones.
- Lubricate O-rings with engine oil.




8. Install injector to injector fuel tube assembly.
9. Install injectors with fuel tube assembly to intake manifold.




Tighten in numerical order shown in the figure.
a. First, tighten all bolts to 6 to 7 N-m (0.6 to 0.7 kg-m, 4.3 to 5.1 ft-lb).
b. Then, tighten all bolts to 10.8 to 14.7 Nm (1.1 to 1.5 kg-m, 8 to 11 ft-lb).
10. Reinstall any part removed in reverse order of removal.

CAUTION: After properly connecting fuel hose to injector and fuel tube, check connection for fuel leakage.