Fuel injection device (Mitsubishi Lancer 3)

Gasoline engines with a power of 84 to 136 hp have an injection device with electronic control. The injection system is regulated by an electronic control unit, which simultaneously determines the correct ignition timing. The control unit receives information from various sensors necessary to determine the optimal fuel injection timing.

The 1.6L turbo engine has a central injection system. This means that the fuel, as in a carburetor, is injected into the intake pipe through one central injection valve. All other engines have an injection system where the fuel is injected at several points (MPI device). With these injection devices, the fuel is injected directly in front of the intake valves through 4 injection valves. The following discussion mainly concerns MPI devices.

All fuel injection system components are designed for a long service life, so the need for their repair is extremely rare. If any of the sensors fails, the control unit switches to the emergency program, and a warning lamp lights up on the dashboard. In this case, the engine runs unevenly, and deviations in the car's behavior may occur. Even the most short-term failures are stored in the control unit's failure memory.