Fuel Control

An electric, positive-displacement, roller-vane type fuel pump is located in the fuel tank. The fuel pump is an integral part of the fuel gauge sending unit. The fuel pump supplies fuel to the fuel rail. A fuel pressure regulator mounted on the fuel rail maintains fuel system pressure at a constant 36 psi (2.5 kg/cm² ).

Power to the fuel pump is supplied by the SMEC via the Automatic Shutdown (ASD) relay. When the SMEC senses a distributor signal during cranking, it grounds the ASD closing contacts. This completes the circuit for the electric fuel pump, injectors and ignition coil. If the distributor signal is lost for any reason, the ASD relay shuts off this circuit in less than one second. This prevents fueling, spark and engine operations.