CIS Pressure Relief Valve

CIS system pressure is determined by the pressure relief valve mounted in the fuel distributor. See Fig. 4-17. System pressure can be adjusted by adding or subtracting shims. To measure and adjust system pressure, see 5.5 Fuel Pressure Tests and Specifications.

Fig. 4-17.

Exploded view of CIS pressure relief valve showing location of adjusting shims (1). O-rings and sealing washer (arrows) should always be replaced.