Notice: 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: Important 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.

1. Relieve fuel system pressure. Refer to Fuel Pressure Relief .
2. Remove the upper intake manifold. Refer to Upper Intake Manifold .
3. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
4. Remove the fuel injector retaining clips (2).
5. Remove the fuel injectors (3).
6. Remove the fuel injector upper O-ring (1).
7. Remove the fuel injector lower O-ring (5).
8. Remove the fuel injector lower O-ring back up (4).

Important: Each fuel injector is calibrated for a specific flow rate. Be sure to use the correct part number when ordering replacement fuel injectors.

Important: 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.

1. Coat all new O-rings with clean engine oil.
2. Install lower O-ring back up (4).
3. Install lower O-ring (5).
4. Install upper O-ring (1).
5. Install fuel injector (3).
6. Install the fuel injector retaining clips (2).
7. Install the fuel rail. The fuel injectors are retained by the fuel rail.
8. Install the upper intake manifold assembly. Refer to Upper Intake Manifold .
9. Install the fuel filler cap.