Operation - Low Pressure Pump

OPERATION - LOW PRESSURE PUMP

When the ignition switch is on, fused battery positive voltage is supplied to the electric lift pump, which will run for 20-30 seconds and then stop. If the engine is cranked, the pump will begin running immediately supplying fuel through fuel filter and onto the high pressure pump. The lift pump and low pressure fuel circuit operate at a pressure between 3.8 -5.5 bar (55 - 80 psi.).