For 1990-2009 cars

### Removal Procedure

1. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
2. Disconnect the fuel injector harness electrical connector(s) from the fuel injector(s).
3. Remove the fuel injector retainer clip (3).
4. Remove the fuel injectors (5) from the fuel rail.

Important: Visually inspect the fuel injector in order to determine if the upper O-ring was also removed. If the upper O-ring is not removed, remove the O-ring from the fuel rail assembly.

5. Remove and discard the fuel injector O-rings (4, 7).

### Installation Procedure

Important: Always install new injector O-rings when servicing the fuel injectors. Lubricate the new injector O-rings with clean engine oil.

1. Install the O-rings on the fuel injector (4, 7).
2. Install the fuel injector clip (3) on the fuel injector (5).

Important: The fuel injector will click when the injector is installed correctly.

3. Install the fuel injector in the fuel rail with the connector facing upward.
4. Connect the fuel injector harness electrical connector(s) to the fuel injector(s).
5. Install the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .