Removal (3.5L & 3.8L)

Relieve fuel pressure. See FUEL PRESSURE RELIEF . Disconnect negative battery cable. On 3.5L, remove fuel injector sight shield. On all models, disconnect pressure regulator vacuum hose. Remove pressure regulator snap ring. Lift and twist pressure regulator from pressure regulator housing attached to fuel rail. Remove back-up "O" ring, large "O" ring, filter screen and small "O" ring from pressure regulator housing.