Fuel Pressure Regulator (CSI)

Fuel pressure regulator is a diaphragm-operated relief valve with injector pressure on one side and manifold pressure (vacuum) on the other. Pressure regulator maintains a pressure of 60-66 psi (4.2-4.6 kg/cm² ) under all operating conditions. Pressure regulator is a factory preset, nonadjustable, spring-loaded diaphragm attached to CSI assembly. Spring tension maintains a constant fuel pressure to injector regardless of engine load.