F 150 Heritage 4WD Pickup V6-4.2L VIN 2 (2004)
Fuel Shut-off Solenoid: Description and Operation
LOW PRESSURE SOLENOID SHUT-OFF VALVE
Low pressure solenoid shut-off valve which isolates the fuel rail from the upstream fuel system when the engine is OFF. This minimizes the amount of
fuel available to flow through the fuel injectors when the engine is off or leak from a damaged fuel rail during and after a crash. The valve is controlled
by the PCM fuel shut-off valve circuit and contains an inertia switch. The valve is only on for one second after a key-on or whenever CKP signals are
being received by the PCM.
