For 1990-2009 cars

### Removal Procedure

Caution: Gasoline or gasoline vapors are highly flammable. A fire could occur if an ignition source is present. Never drain or store gasoline or diesel fuel in an open container, due to the possibility of fire or explosion. Have a dry chemical (Class B) fire extinguisher nearby.

1. Remove the fuel rail assembly. Refer to Fuel Injection Fuel Rail Assembly Replacement .
2. Clean the interface area of the rail regulator using proper degreasing materials and compressed air for drying.

Important: Cleaning material must not penetrate the electric connector.

3. Loosen the pressure regulator using a commercial wrench WAF30. Grasp it by hand and pull it out while simultaneously turning it counterclockwise.

### Installation Procedure

Notice:

• | Use care when servicing the fuel system components, especially the fuel injector electrical connectors, the fuel injector tips, and the injector O-rings. Plug the inlet and the outlet ports of the fuel rail in order to prevent contamination.

• | Do not use compressed air to clean the fuel rail assembly as this may damage the fuel rail components.

• | Do not immerse the fuel rail assembly in a solvent bath in order to prevent damage to the fuel rail assembly.

Important: The common rail regulator and O-ring must not be reused.

1. Inspect and clean the threads and the sealing surface of the fuel rail.
2. Inspect and clean the threads (1) and bite edge (2) of the common rail regulator.
3. Lubricate the O-rings with fuel.

Notice: Refer to Fastener Notice in the Preface section.

4. Install the common rail regulator using a commercial wrench WAF30 counteracting with a wrench WAF35 at the hexagon of the housing.

Tighten
Tighten the common rail regulator to 60 N·m (44.3 lb ft) and turn the regulator 90 degrees in the opposite direction and then tighten to 85 N·m (62.7 lb ft).

5. Prime the fuel system. Refer to Fuel System Priming .