1. Relieve fuel system pressure. Refer to Fuel Pressure Relief .
2. Remove the upper intake manifold. Refer to Upper Intake Manifold .
3. Remove the fuel pressure regulator vacuum line.
4. Remove the fuel pressure regulator retaining screw.
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 from the fuel rail.
6. Remove the retainer and spacer bracket from rail and discard.
7. Remove the fuel pressure regulator from engine fuel return pipe.
8. 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. Filter screen for contamination. If contaminated, remove and discard filter screen.
2. Lubricate new pressure regulator inlet O-ring with clean engine oil and install on regulator inlet.
3. Install the fuel return pipe to regulator.
4. Install the new retainer and spacer bracket into slot on fuel rail.
5. Install the pressure regulator to fuel rail.

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

6. Install the fuel pressure regulator vacuum line.
7. Install 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. Install the upper intake manifold. Refer to Upper Intake Manifold .
10. Install the fuel filler cap.
11. Inspect for leaks:

11.1.

Turn the ignition switch to the ON position for 2 seconds.

11.2.

Turn the ignition switch to the OFF for 10 seconds.

11.3.

Turn the ignition switch to the ON position.

11.4.

Check for fuel leaks.