Fuel Injector: Service and Repair

CAUTIONS:
^ Use care in removing the fuel injectors to prevent damage to the fuel injector electrical connector pins or the fuel injector nozzles. The fuel injector is an electrical component and should not be immersed in any type of cleaner as damage to the fuel injector may result.

^ The fuel injector is serviced as a complete assembly only. If the fuel injectors are found to be leaking, the engine oil may be contaminated with fuel.

^ Each fuel injector is calibrated for a specific flow rate. Be sure to use the correct pant number when ordering replacement fuel injectors. When replacing the fuel injector O-rings, be sure to install the brown O-ring in the lower position. The fuel injector lower O-ring uses a nylon collar, called the O-ring backup, to properly position the O-ring on the fuel injector. Be sure to reinstall the O-ring backup, or the sealing O-ring may move on the fuel injector when installing the fuel rail. If the sealing O-ring is not seated properly, a vacuum leak is possible and driveability complaints may occur.

REMOVE OR DISCONNECT
1. Relieve fuel system pressure, refer to Fuel Pressure Release.
2. Upper intake manifold.
3. Remove the fuel rail. Refer to Fuel Rail Assembly




4. Remove the fuel injector retaining clips.
5. Remove the fuel injectors.

INSTALL OR CONNECT
1. Fuel injector upper O-ring (1).
2. Fuel injector lower O-ring backup (4).
3. Fuel injector lower O-ring (5).
4. Repeat steps 1, 2 and 3 for all injectors.
5. Fuel injectors to fuel rail.
6. Fuel injector retaining clips.
7. Fuel rail. The fuel injectors are retained by the fuel rail.
8. Upper intake manifold.
9. Fuel filler cap.