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



2. Clean any dirt from the retaining ring of the fuel pressure regulator .
3. Remove the vacuum hose 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 filter screen (3).
8. Remove the large regulator O-ring (4).
9. Remove the back up regulator O-ring (5).
10. 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 back up regulator O-ring (5).
3. Install the large regulator O-ring (4).
4. Install the regulator filter screen (3).
5. Install the small regulator O-ring (2).
6. Install the fuel pressure regulator (6) in the fuel pressure regulator housing (1).
7. Install the snap ring (7).



8. Install the vacuum hose to the fuel pressure regulator.
9. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .