Cavalier L4-2.2L VIN F (2004)
Fuel Pressure: Testing and Inspection
Fuel System Diagnosis
FUEL SYSTEM DIAGNOSIS
SYSTEM DESCRIPTION
The control module enables the fuel pump relay when the ignition switch is turned ON. The control module will disable the fuel pump relay within
two seconds unless the control module detects ignition reference pulses. The control module continues to enable the fuel pump relay as long as
ignition reference pulses are detected. The control module disables the fuel pump relay within two seconds if ignition reference pulses cease to be
detected and the ignition remains ON.
The fuel tank stores the fuel supply. The electric fuel pump supplies fuel through an in-line fuel filter to the fuel injection system. The pump provides
fuel at a higher rate of flow than is needed by the fuel injection system. The fuel pressure regulator maintains the correct fuel pressure to the fuel
injection system. A separate pipe returns unused fuel to the fuel tank.
TEST
Steps 1 - 3
