Fuel Pump

Fuel Pump:

The fuel pump motor, located inside the fuel tank as an assembly to the primary fuel pump module (right side of fuel tank), supplies fuel pressure to the fuel injectors. The ECM controls the fuel pump motor by controlling the fuel pump relay in the Underhood Fuse Block (UHFB). The fuel pump motor is supplied constant ignition voltage whenever the fuel pump relay is turned On. The ECM turns On the fuel pump relay whenever the engine is running or cranking. The ECM will NOT run the fuel pump unless crankshaft position sensor pulses are being received.