Fuel injection system (since 1986) (Mazda Capella GC)

Later models are equipped with an electronic fuel injection system. It consists of three main systems: fuel supply, air supply and electronic control. Servicing the fuel injection system fitted to some later model vehicles may require special equipment, so please contact a service centre.

Power supply system

Figure 15.11. Elements of the fuel supply system: 1 – fuel filter (on the high-pressure line); 2 – fuel distribution line; 3 – nozzle; 4 – tank; 5 – pressure regulator control valve; 6 – fuel tank filter (on the suction side); 7 – fuel pump; 8 – three-way distribution valve

An electrically driven fuel pump located inside the fuel tank supplies fuel under constant pressure to the fuel rail, from which the fuel is distributed to all four injectors (figure 15.11). From the fuel distribution line, fuel is injected by four injectors into the intake ports located directly above the intake valves. The injected fuel dose is strictly controlled by a microprocessor-based control unit, the so-called EGI unit. The pressure regulator controls the system pressure according to the degree of vacuum in the engine's intake manifold. The fuel filter, located between the fuel distribution line and the fuel pump, provides protection against contamination of the fuel supply system components.

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