Fuel Injection is a device that atomizes the fuel by forcibly pumping it through a small nozzle under high pressure and delivering it to the vehicle's engine. Fuel injectors are responsible for delivering fuel to each cylinder. Most modern vehicles use fuel injectors that spray fuel into the intake manifold or directly into the cylinders. Fuel injection allows for more precise fuel control and improved fuel efficiency. Overall, fuel injectors provide better fuel economy compared to what can be achieved with a carburetor.