Fuel Injector

Fuel Injector:

The fuel injectors on this model are approximately half the size and weight of a traditional fuel injector and, have a simplified design that reduces the potential for contamination.

The fuel injectors deliver the fuel to the engine. The fuel injector is a solenoid operated device controlled by the PCM. The injector is provided a continuous supply of pressurized fuel. The PCM energizes the solenoid which opens a valve to allow fuel delivery. When the injector nozzle opens, the pressurized fuel is injected into the intake manifold, providing an atomized air fuel mixture for the engine. The fuel further atomizes as it enters the combustion chamber.

Engine RPM determines when an injector opens, the PCM, based on readings of coolant temperature, engine load, throttle position, and oxygen sensor voltage determines how long to leave the fuel injector open.

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 to be noticed on some engines.