Passport EX 4WD V6-3165cc 3.2L DOHC MFI (2001)
Fuel Meter Body: Description and Operation
Fuel Metering System Components
Fuel Injector
Fuel Injector
The sequential multiport fuel injection (SFI) fuel injector is a solenoid-operated device controlled by the PCM. The PCM energizes the solenoid, which
opens a valve to allow fuel delivery.
The fuel is injected under pressure in a conical spray pattern at the opening of the intake valve. Excess fuel not used by the injectors passes through the
fuel pressure regulator before being returned to the fuel tank.
A fuel injector which is stuck partly open will cause a loss of fuel pressure after engine shut down, causing long crank times.
Fuel Pressure Regulator
Fuel Pressure Regulator
The fuel pressure regulator is a diaphragm-operated relief valve mounted on the fuel rail with fuel pump pressure on one side and manifold pressure on
the other side. The fuel pressure regulator maintains the fuel pressure available to the injector at three times barometric pressure adjusted for engine load.
It may be serviced separate.
If the pressure is too low, poor performance and a DTC P0131,DTC P0151,DTC P0171 Or DTC P1171 will be the result. If the pressure is too high,
excessive odor and/or a DTC P0132, DTC P0152,DTC P0172 will be the result. Refer to Fuel System Diagnosis for information on diagnosing fuel
pressure conditions.