45. Clean the fuel pressure regulator ring, located directly on its top, of all dirt deposits (see illustration).
13.45. retaining ring (indicated by an arrow) located above the fuel pressure regulator
46. Disconnect the vacuum tube.
47. Squeeze the ring with special pliers and remove it from the regulator.
48. Lift the regulator while turning it and remove it from the housing.
49. Cover the regulator housing with a clean rag to prevent contaminants from entering the system.
50. Install new O-rings and lubricate them with a thin coat of engine oil.
51. The regulator is installed in the reverse order.