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 line from the pressure regulator.



4. Remove the snap ring (7).
5. Using a shop towel to catch any spilled fuel; lift and twist the fuel pressure regulator in order to remove the fuel pressure regulator (6) from the fuel pressure regulator housing (1).
6. Remove the small regulator O-ring (2).
7. Remove the regulator O-rings (4,5).
8. Cover the fuel pressure regulator housing (1) to prevent contamination from entering the fuel system.

Notice: 

1. Install the new O-rings on the fuel pressure regulator (6), if a new fuel pressure regulator is not being installed. Lubricate the O-rings lightly with clean engine oil.
2. Install the regulator O-rings (4,5).
3. Install the small regulator O-ring (2).
4. Install the fuel pressure regulator (6) in the fuel pressure regulator housing (1).
5. Install the snap ring (7).



6. Install the vacuum line to the fuel pressure regulator.
7. Tighten the fuel fill cap.
8. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
9. Inspect for leaks.

9.1.	Turn ON the ignition for 2 seconds.

9.2.	Turn OFF the ignition for 10 seconds.

9.3.	Turn ON the ignition.

9.4.	Inspect for fuel leaks.

10. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical - 3.8L.