Fuel Injector: Service and Repair

IMPORTANT:
- Remove the fuel injectors carefully in order to prevent damage to the injector electrical connector pins and the injector nozzle. Service the fuel injector as a complete assembly only. The fuel injector is an electrical component. Do not immerse the fuel injector in any type of cleaner.
- Leaking fuel injectors may contaminate the engine oil with fuel.


REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief Procedure.




3. Remove the fuel rail assembly. Refer to Fuel Rail Assembly Replacement.

Description:

4. Spread the injector retainer clip to release the injector from the fuel rail.
5. Remove the fuel injector.
6. Discard the injector retainer clip.
7. Remove the injector O-ring seals from both ends of the injector.
8. Discard the injector O-ring seals.




INSTALLATION PROCEDURE

IMPORTANT: When ordering new fuel injectors, be sure to order the correct injector for the application being serviced. The fuel injector assembly is stamped with a part number identification (2), a manufacturing date (3), a week code (1), and a production plant number (4).


1. Lubricate the new injector O-ring seals with clean engine oil.
2. Install the new injector O-ring seals on the injector.
3. Install a new retainer clip on the injector.
4. Push the fuel injector into the fuel rail injector socket with the electrical connector facing outward.
5. Install the fuel rail assembly. Refer to Fuel Rail Assembly Replacement.
6. Tighten the fuel filler cap.
7. Connect the negative battery cable.
8. Inspect for leaks.
8.1. Turn the ignition switch ON for 2 seconds.
8.2. Turn the ignition switch OFF for 10 seconds.
8.3. Turn the ignition switch ON.
8.4. Check for fuel leaks.