Fuel Control System
Fuel control system contains an electric fuel pump, located in the fuel tank with gauge sending unit. Fuel is pumped to the fuel rail through an in-line fuel filter. Fuel pump provides fuel at a pressure exceeding fuel injector requirements.
Pressure regulator, mounted on the fuel rail, maintains a proper constant fuel pressure to the injectors. Pressure regulator increases the fuel pressure when engine vacuum decreases.
Unused fuel is returned to the fuel tank by a fuel return line. For correct fuel injector delivery at the ECM command, the fuel supply system maintains a constant pressure of approximately 36.0 psi (2.5 kg/cm2 ) drop across the injectors.
The fuel pressure accumulator, used on some models, isolates fuel line noises. The fuel rail provides the upper mount for fuel injectors. Spring-loaded pressure tap may be used for testing fuel system.