Fuel Injector: Service and Repair

Fuel Rail Installation:

Fuel Injector and Clip:

Fuel Injector Replacement

Important:

^ Use care in removing the fuel injectors to prevent damage to the electrical connector pins on the injector and to prevent damage to the 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.
^ The engine oil may be contaminated with fuel if the fuel injectors are leaking.

Removal Procedure

1. Disconnect the negative battery cable.

2. Relieve the fuel system pressure. Refer to the Fuel Pressure Release.

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

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. Save the O-ring backup for use in reinstallation.

Installation Procedure

Important:

^ When ordering new fuel injectors, be sure to order the correct injector for the application being serviced.

^ The upper and lower fuel injector O-rings use different part numbers. To identify the correct O-ring, the upper O-ring is black and the lower O-ring is brown. Both O-rings are the same size but consist of different material.

^ The fuel injector lower O-ring uses a nylon collar, called the O-ring backup, to properly position the O-ring on the injector. Always reinstall the O-ring backup, or the sealing O-ring may move on the injector when installing the fuel rail and result in a possible vacuum leak.

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. Position the clip on the right side of the injector electrical connector.

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.

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 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.