Electronic Fuel Injection (EFI)?

A fuel injection system is designed and calibrated specifically for the type(s) of fuel it will handle. Most fuel injection systems are for gasoline or diesel applications. With the advent of electronic fuel injection (EFI), the diesel and gasoline hardware has become similar. EFI's programmable firmware has permitted common hardware to be used with different fuels. Carburetors were the predominant method used to meter fuel on gasoline engines before the widespread use of fuel injection. A variety of injection systems have existed since the earliest usage of the internal combustion engine.

Although electronicelectronicelectronic fuelfuelfuel injectioninjectioninjection is much more complicated than a carburetor, it is much more efficient. The injector is a type of valve that is controlled electronically, which opens and closes and supplies atomized fuelfuelfuel to the engine. It sprays fuelfuelfuel into the intake valves directly in the form of a fine mist. The injector opens and closes rapidly, and the pulse width, or the amount of time it stays open, determines how much fuelfuelfuel goes into the valve. FuelFuelFuel is supplied to the injectors by a fuelfuelfuel rail.