High pressure fuel is supplied by an electric pump in the fuel tank. Pressure is
regulated by the fuel pressure regulator. The fuel injector is a solenoid
operated device, controlled by the Powertrain Control Module (PCM), that
meters pressurized fuel to a single engine cylinder. The PCM energizes the
high-impedance (12.0 ohms) injector solenoid to open a normally closed ball
valve. This allows fuel to flow into the top of the injector, past the ball valve,
and through a director plate at the injector outlet. The director plate has four
machined holes that control the fuel flow, generating a spray of finely atomized
fuel at the injector tip. Fuel from the injector tip is directed at the intake valve,
causing the fuel to become further atomized and vaporized before entering the
combustion chamber. An injector stuck partly open can cause a loss of
pressure after engine shutdown. Consequently, long cranking times would be
noticed on some engines. A leaking fuel pressure regulator can also cause this.
regulated by the fuel pressure regulator. The fuel injector is a solenoid
operated device, controlled by the Powertrain Control Module (PCM), that
meters pressurized fuel to a single engine cylinder. The PCM energizes the
high-impedance (12.0 ohms) injector solenoid to open a normally closed ball
valve. This allows fuel to flow into the top of the injector, past the ball valve,
and through a director plate at the injector outlet. The director plate has four
machined holes that control the fuel flow, generating a spray of finely atomized
fuel at the injector tip. Fuel from the injector tip is directed at the intake valve,
causing the fuel to become further atomized and vaporized before entering the
combustion chamber. An injector stuck partly open can cause a loss of
pressure after engine shutdown. Consequently, long cranking times would be
noticed on some engines. A leaking fuel pressure regulator can also cause this.
Fuel Injection
Warning Lights