The 6.5L diesel engine uses the Stanadyne model DS rotary distributor fuel pump consisting of the following components (figure 4-5):
โข A fuel solenoid driver that determines fuel metering by controlling the fuel solenoid
โข An optical/fuel temperature sensor that supplies the PCM with pump speed, rotor position, cam ring position and fuel temperature information
โข An engine shutoff (ESO) solenoid located on top of the pump
โข An injection timing stepper (ITS) motor that controls injection timing advance and retard
โข A fuel solenoid that opens and closes a control valve for pump fill and spill activity
โข Inlet and outlet ports for fuel to and from the pump
