Fuel Injector: Service and Repair

REMOVAL PROCEDURE

NOTE: Use care in removing the fuel injectors to prevent damage to the electrical connector terminals, the injector filter, and the fuel nozzle.

The fuel injector is serviced as a complete assembly only.

Also since the injectors are electrical components, these injectors should not be immersed in any type of liquid solvent or cleaner as damage may occur.




1. Relieve the fuel pressure. Refer to Fuel Pressure Relief Procedure.
2. Remove the air cleaner from the Throttle Body Fuel Injection (TBI) unit.
3. Remove the two bolts and the air cleaner stud bracket from the TBI unit.




4. Remove the two screws (3) and the fuel injector cover (1) (with the electrical connector attached) from the fuel injector.




5. Remove the fuel injector from the TBI unit.

INSTALLATION PROCEDURE

IMPORTANT: Replace the fuel injector with an identical part. Other fuel injectors may appear to be the same, but they are calibrated differently with different flow rates and are not interchangeable.




1. Apply a thin coat of oil to the new upper and lower O-rings and install them onto the fuel injector.
2. Install a new lower fuel injector insulator into the fuel injector cavity of the TBI unit.

NOTE: Do not twist the fuel injector during the installation to the throttle body in order to prevent damage and misalignment of the fuel injector O-ring seals.

3. Install the fuel injector to the TBI unit.




4. Install the fuel injector cover (1) to the fuel injector (with the electrical connector attached) and secure with the two screws (3).

NOTE: Refer to Fastener Notice in Service Precautions.




5. Install the air cleaner stud bracket to the TBI unit and secure with the two bolts.

Tighten
Tighten the air cleaner stud bracket bolts to 10 N.m (89 lb in).

6. Install the air cleaner.
7. Connect the negative battery cable.

Tighten
Tighten the negative battery cable terminal retainer to 5.5 N.m (49 lb in).

8. Turn ON the ignition in order to pressurize the fuel system.
9. Turn OFF the ignition.
10. Check for any fuel leaks.