The Electronic Fuel Injection (EFI) system precisely controls fuel injection to match engine requirements, reducing emissions and increasing drivability. The electric fuel pump supplies fuel to the fuel pressure regulator. The 4 fuel injectors are electric solenoid valves which open and close by signals from the Electronic Control Unit (ECU).
The EFI computer receives input from various sensors to determine engine operating condition. The sensors provide the input to the control unit, which determines the amount of fuel to be injected by its preset program. Some of these sensors are: