For 1990-2009 cars

### Removal Procedure

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: 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 Intake Manifold Replacement .
3. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
4. Remove the fuel injector retaining clips.
5. Remove the fuel injector(s).

### Installation Procedure

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

1. Install the fuel injector upper O-ring (1).
2. Install the fuel injector lower O-ring backup (4).
3. Install the fuel injector lower O-ring (5).
4. Install the fuel injector (3) to fuel rail.
5. Install the fuel injector retaining clips (2).
6. Install the fuel rail.
7. Reinstall the upper intake manifold. Refer to Intake Manifold Replacement .
8. Install the fuel filler cap.
9. Reconnect negative battery cable. Refer to Battery Replacement in engine electrical.
10. Check for fuel leaks.

10.1. | Turn the ignition switch On for 2 seconds.

10.2. | Turn the ignition switch Off for 10 seconds.

10.3. | Turn the ignition switch On.

10.4. | Check for fuel leaks.