Trooper LS V6-3.5L (1998)
6. Remove the fuel pressure regulator attaching screw.
7. Remove the fuel pressure regulator from the fuel rail.
Disassembly Procedure
1. Remove the O-ring from the fuel pressure regulator.
2. Loosen the swivel nut.
3. Remove the fuel return line from the fuel pressure regulator.
4. Remove the O-ring from the fuel return line.
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The O-ring may be left inside the fuel pressure regulator instead of on the fuel return line.
Assembly Procedure
1. Install a new O-ring on the fuel return line.
2. Install the fuel return line on the fuel pressure regulator.
NOTE: Do not over-tighten the swivel nut on the fuel pressure regulator. The fuel pressure regulator can be damaged and fuel may leak if the
swivel nut is over-tightened.
3. Tighten the swivel nut.
4. Install a new O-ring on the fuel pressure regulator.
Installation Procedure
1. Install the fuel pressure regulator attaching screw.
Tighten: Tighten the fuel pressure regulator attaching screw to 3 .m (26 lb in.).
2. Install the fuel pressure regulator on the fuel rail.
3. Install the two bolts to the protector that secures the common chamber.
4. Install the pressure regulator hose to the fuel pressure regulator.
5. Install the fuel pump relay. Refer to Fuel Pump Relay
6. Connect the negative battery cable.
7. Crank the engine until it starts. Cranking the engine may take longer than usual due to trapped air in the fuel lines.
