The engine power system consists of a fuel tank, an electric fuel pump, a fuel pressure regulator, an EFI relay box, a fuel pump relay, a fuel distribution line, injectors, an air filter and a throttle assembly and fuel lines. All models are equipped with a sequential electronic fuel injection system (Sequential Electronic Fuel Injection system).
The sequential electronic fuel injection system calculates the quantity and delivers fuel to the engine cylinders in the order in which they are fired. The injectors are controlled by the engine control unit (PCM). Based on information from various sensors, the PCM unit controls the fuel injectors by changing the pulse length, i.e. the length of time the injectors are open. The amount of fuel is constantly changing to provide the optimum ratio for hot or cold starting, warm-up, idling and acceleration. The throttle assembly serves only to control the amount of air supplied to the engine cylinders.
Fuel from the fuel tank to the fuel system is supplied through metal tubes fixed under the bottom of the vehicle. The electric fuel pump, fuel level sensor and pressure regulator are located in the fuel tank.
The fuel pump relay is controlled by two electrical circuits. On the first circuit, control is carried out from the engine control unit (PCM), and on the second - from the ignition switch. If the engine is not started after the ignition is turned on, the PCM will turn off the fuel pump relay after 2 seconds. The next time the engine is started, after the first pulse from the camshaft position sensor, the relay turns on the fuel pump.
The exhaust system consists of an exhaust manifold, exhaust pipe, center and rear mufflers and a catalytic converter. The catalytic converter cleans the exhaust gases.