General information about the power supply system (Honda Civic 3)

The engines described in this manual are equipped with carburetors and fuel injection systems. All engines produced in 1984 are equipped with three-barrel carburetors. Since 1984, fuel injection systems have been installed on some models (only on request). Injection systems, depending on the year of manufacture and engine size, used multi-point or two-point injection. A multi-point injection system involves pulsed fuel supply to the intake port of each cylinder and is controlled by an electronic control module (ECM). The ECM calculates the fuel supply and its sequence depending on the signals from the sensors. A two-point injection system uses two injectors mounted on the throttle body. The injectors supply fuel to the intake manifold.

Carburetor engines are equipped with a mechanically driven booster pump. In 1985-1987, fuel injection models were equipped with electrically driven booster pumps mounted near the fuel tank at the left rear wheel. Since 1989, electric pumps have been installed in the fuel tank.

The exhaust system consists of a downpipe, a catalytic converter, an exhaust pipe and a muffler. Information about the converter is located in Chapter 6.