Fuel system
The fuel system consists of a fuel tank, an electric fuel pump, a fuel pump relay, fuel lines, and a fuel injection system. On all models up to 1995, a two-injector injection system is used through the throttle pipe (TBI system). This system uses two injectors mounted inside the throttle body. Fuel is sprayed under pressure into a conventional type intake manifold, from where it is delivered to the intake ducts.
Models since 1996 with 5.0L and 5.7L V6 and V8 engines are equipped with a centralized sequential injection system (Central SFI system). On models with 7.4 liter V8 engines since 1996, a multi-nozzle sequential fuel injection system has been used (SFI system).
In the Central SFI system, the throttle pipe is mounted in the upper section of the intake manifold. The centrally located injector block is installed in the space between the upper and lower manifolds. The nozzle block consists of six (on V6 engine) or eight (on V8 engine) fuel injectors connected by hoses to the nozzles of each cylinder. The nozzles are equipped with poppet valves.
The SFI system used on the 7.4 liter engine has a plastic fuel distributor mounted on the lower intake manifold. The fuel distributor consists of 8 injectors, a pressure regulator, wires and a fitting for checking fuel pressure. The throttle body is mounted on the upper intake manifold.
On all models of atomizer with an electromagnetic drive. Fuel is supplied to each nozzle at a constant pressure, which is automatically set by the pressure regulator. Excess fuel is returned to the tank. The signal from the PCM processor unit opens the injector, providing atomization of fuel in the channel or in the throttle pipe. The injector open time determines the air-fuel composition of the mixture.
The electric fuel pump is mounted in a single module with a fuel level sensor.
Exhaust system
The exhaust system includes an exhaust manifold with an oxygen sensor, a catalytic converter, and an exhaust silencer.