Fuel Injector: Service and Repair

FUEL INJECTOR REPLACEMENT

TOOLS REQUIRED
J 34730-1A Fuel Pressure Gauge

REMOVAL PROCEDURE

NOTE: Use care in removing the fuel injectors in order to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles. Do not immerse the fuel injector in any type of cleaner. The fuel injector is an electrical component and may be damaged by this cleaning method.

IMPORTANT: The engine oil may be contaminated with fuel if the fuel injectors are leaking.

CAUTION: Refer to the Battery Disconnect Caution in Service Precautions.




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.
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. Discard the 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. The retainer clip locks on to a flange on the fuel rail injector socket.
5. Install the fuel rail assembly.
6. Tighten the fuel filler cap.
7. Connect the negative Battery cable.
8. Inspect for leaks.
8.1. Turn ON the ignition for 2 seconds.
8.2. Turn OFF the ignition for 10 seconds.
8.3. Turn ON the ignition.
8.4. Check for fuel leaks.
9. Perform the Idle Learn Procedure. Refer to Idle Learn Procedure.