Notice: Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering the open pipes and passages.

Important: Always maintain cleanliness when servicing fuel system components.

1. Relieve the fuel pressure. Refer to Fuel Pressure Relief .



2. Remove the fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement .
3. Clean any dirt from the fuel pressure regulator retaining ring.
4. Remove the snap ring (1).
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 (2) from the fuel pressure regulator housing.
6. Remove the pressure regulator small O-ring (6).
7. Remove the pressure regulator filter screen (5).
8. Remove the pressure regulator large O-ring (4).
9. Remove the pressure regulator O-ring back up (3).
10. Cover the fuel pressure regulator housing in order to prevent contamination from entering the fuel system.

Notice: 

1. Install new O-rings on the fuel pressure regulator. Lubricate the O-rings lightly with clean engine oil.
2. Install pressure regulator O-ring back up (3).
3. Install pressure regulator large O-ring (4).
4. Install pressure regulator filter screen (5).
5. Install pressure regulator small O-ring (6).
6. Install the fuel pressure regulator (2) in the fuel pressure regulator housing.
7. Install the snap ring (1).
8. Install the fuel rail.
9. Reconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
10. Inspect for leaks.

10.1.

Turn ON the ignition for 2 seconds.

10.2.

Turn OFF the ignition for 10 seconds.

10.3.

Turn ON the ignition.

10.4.

Check for fuel leaks.