Tracker 4WD V6-2.5L VIN 4 (2001)
Fuel Pressure: Testing and Inspection
SYSTEM DESCRIPTION
The Powertrain Control Module (PCM) will energize the fuel pump relay for 3 seconds when the ignition switch is turned to the ON position. The
fuel pump will operate and pressurize the fuel system when the fuel pump relay is energized. The PCM receives ignition system reference pulses when
the engine is being cranked or when the engine is running. The PCM will continue to energize the fuel pump relay as long as the PCM receives
ignition system reference pulses. The PCM will de-energize the fuel pump relay when ignition system reference pulses are no longer detected.
The fuel supply system delivers fuel to the fuel injectors at a controlled pressure. The controlled fuel pressure is 270-310 kPa (39-45 psi) when the
fuel pump is energized and the engine is not running. The controlled fuel pressure is 210-260 kPa (30-37 psi) when the engine is idling at normal
operating temperatures. The fuel pressure regulator maintains the correct fuel pressure at all times by returning excess fuel to the fuel tank.
TEST DESCRIPTION
