Important: Always maintain cleanliness when servicing fuel system components.

1. Relieve the fuel pressure. Refer to Fuel Pressure Relief .
2. Clean any dirt from the fuel pressure regulator retaining ring.
3. Remove the vacuum hose from the pressure regulator (6).
4. Remove the regulator assembly retainer clip (1).
5. Lift and twist the fuel pressure regulator in order to remove the fuel pressure regulator from the fuel pressure regulator housing using a shop towel to catch any spilled fuel.
6. Remove the regulator seal lower O-ring (2).
7. Remove the regulator assembly filter (3).
8. Remove the regulator seal upper O-ring (4).
9. Remove the regulator seal back-up ring (5).
10. Cover the fuel pressure regulator housing to prevent contamination from entering the fuel system.

Notice: 

1. Install the new O-rings on the fuel pressure regulator, if a new fuel pressure regulator is not being installed. Lubricate the O-rings lightly with clean engine oil.
2. Install the regulator seal lower O-ring (2).
3. Install the regulator assembly filter (3).
4. Install the regulator seal upper O-ring (4).
5. Install the regulator seal back-up ring (5).
6. Install the regulator assembly retainer clip (1).
7. Install the vacuum line to the fuel pressure regulator.
8. Install the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
9. Inspect for leaks.

9.1.	Turn the ignition switch ON for 2 seconds.

9.2.	Turn the ignition switch OFF for 10 seconds.

9.3.	Turn the ignition switch ON.

9.4.	Visually inspect the fuel system for fuel leaks.




10. Install the injector sight shield. Refer to Fuel Injector Sight Shield Replacement .