Fuel Pressure Regulator: Service and Repair

Fuel Pressure Regulator Replacement

Removal Procedure

Note: Always maintain cleanliness when servicing fuel system components.

Fuel Regulator Hose:

1. Relieve the fuel pressure. Refer to Fuel Pressure Relief (Without CH 48027) (Fuel Pressure Relief (Without CH 48027))Fuel Pressure Relief (With CH 48027) (Fuel Pressure Relief (With CH 48027)).
2. Clean any dirt from the fuel pressure regulator retaining ring.
3. Remove the vacuum line from the pressure regulator.

Fuel 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 regulator O-ring small (2).
7. Remove the regulator O-ring large (4).
8. Remove the regulator O-ring back up (5).
9. Cover the fuel pressure regulator housing (1) to prevent contamination from entering the fuel system.

Installation Procedure

Caution:
* Do not use compressed air in order to test or clean a fuel pressure regulator as damage to the fuel pressure regulator may result.
* Clean the fuel pressure regulator filter screen with gasoline if necessary.
* Do not immerse the fuel pressure regulator in a solvent bath in order to prevent damage to the fuel pressure regulator.

Fuel Pressure Regulator:

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 back up O-ring (5).
3. Install the regulator O-ring large (4).
4. Install the regulator O-ring small (2).
5. Install the fuel pressure regulator (6) in the fuel pressure regulator housing (1).
6. Install the snap ring (7).

Fuel Regulator Hose:

7. Connect the vacuum line to the fuel pressure regulator.
8. Tighten the fuel fill cap.
9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (L26) (Service and Repair)Battery Negative Cable Disconnection and Connection (LS4) (Service and Repair).
10. Inspect for leaks.

1. Turn ON the ignition for 2 seconds.
2. Turn OFF the ignition for 10 seconds.
3. Turn ON the ignition.
4. Inspect for fuel leaks.

11. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement (Service and Repair).