1. Relieve fuel system pressure. Refer to Fuel Pressure Relief .
2. Disconnect the fuel pressure regulator vacuum line.
3. Remove the fuel pressure regulator retaining screw.
4. Using a shop towel to catch any spilled fuel, lift and twist the fuel pressure regulator in order to remove the fuel pressure regulator from the fuel rail.
5. Remove the retainer and spacer bracket from rail and discard.
6. Remove the fuel pressure regulator from the engine fuel return pipe.
7. Remove the fuel pressure regulator inlet O-ring and discard.

Caution: Connect the fuel return line before tightening the regulator attaching screw in order to prevent the regulator from rotating. Rotation of the regulator could damage the retainer and spacer bracket and lead to a fuel leak at the regulator inlet.

Notice: 

1. Check the filter for contamination. If the filter is contaminated, replace the fuel pressure regulator.
2. Lubricate the new pressure regulator O-ring with clean engine oil and install on the regulator inlet.
3. Install the fuel return pipe to regulator.
4. Install the new retainer and the spacer bracket into the slot on the fuel rail.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

5. Install the pressure regulator to the fuel rail.

Tighten
Tighten engine fuel return pipe nut to 17 N·m (13 lb ft).

6. Reconnect the fuel pressure regulator vacuum line.
7. Reinstall the pressure regulator attaching screw.

Tighten
Tighten pressure regulator attaching screw to 8.5 N·m (76 lb in).

8. Inspect and verify that retainer and spacer bracket is engaged in slots in fuel rail. Grasp and pull on regulator to ensure that it is properly seated.
9. Reinstall the fuel filler cap.
10. Reconnect the battery negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
11. Inspect the fuel system.

11.1.

Turn the ignition ON for 2 seconds.

11.2.

Turn the ignition OFF for 10 seconds.

11.3.

Turn the ignition ON.

11.4.

Check for fuel leaks.