Warning: See warning in subsection 1.
1. Relieve pressure in the fuel system (see subsection 2).
2. Disconnect the negative battery cable.
3. Remove the intake air duct resonator (see subsection 9).
4. Clean the areas around the fuel pressure regulator and fuel lines.
5. Disconnect the regulator vacuum line and disconnect the engine wiring harness from the front (see illustration).
13.5. Fuel pressure regulator components: A. Vacuum line; B. Fuel drain line; C. Fastening screw
6. Disconnect the fuel return line (see subsection 4) and remove the holder.
7. Unscrew the fastening screw and remove the fuel pressure regulator.
Caution: Wrap a cloth around the regulator to absorb any fuel that may spill during removal.
8. Install a new O-ring and lubricate it with clean engine oil (see illustration).
13.8. Lubricate the O-ring with a thin layer of engine oil
9. The remainder of the installation procedure is performed in the reverse order of removal.
10. Tighten the fuel pressure regulator screw to the required torque.