The outlet of the transfer pump connects to a threaded restrictor known as the vent wire assembly (figure 5-22). The assembly includes a wire with hooked ends. The vent wire assembly causes fuel under transfer pump pressure to undergo a volume decrease. It also vents the pump of air.
Fuel passing through the vent wire assembly flows inside the pump housing to cool and lubricate most of the injection pump internal components, similar to non-EFI pumps.
