Fuel Injector: Service and Repair
REMOVAL1. Remove the intake manifold as outlined in this section.
2. Disconnect fuel supply and fuel return lines.
3. Carefully disconnect wiring harness from injectors.
Fuel Supply Manifold:
4. Disconnect vacuum line from fuel pressure regulator valve.
5. Remove four fuel supply manifold retaining bolts (two on each side).
Fuel Supply Manifold - Exploded View:
6. Disengage fuel supply manifold from fuel injectors by lifting and gently rocking the rail.
7. Remove injector by lifting while rocking side to side.
CAUTION: Injectors and fuel rail must be handled with extreme care to prevent damage to sealing areas and sensitive fuel metering orifices.
INSTALLATION
1. Examine injector O-rings for deterioration. Install new O-rings, as necessary.
2. Lubricate new O-rings and install two on each injector using light grade oil.
3. Ensure injector cups are clean and free of contamination or damage.
4. Install injectors in fuel rail using light twisting pushing motion.
5. Carefully install supply manifold and injectors into lower intake manifold, one side at a time. To ensure that O-rings are seated, push down on fuel rail.
6. While holding fuel supply manifold in place, install two retaining bolts and tighten to 7 lb. ft. (10 N-m).
7. Connect fuel supply (1/2-inch) and fuel return (3/8-inch) lines.
8. Before connecting the fuel injector harness, turn key to the ON position. This will pressurize the fuel system.
9. Using a clean paper towel, check for leaks where the injector connects to the fuel rail. If leaks are detected, service as required.
10. Connect the fuel injector harness at injectors.
11. Connect vacuum line to fuel pressure regulator.
12. Install the intake manifold.
13. Start engine and check for leaks.