What Are Fuel Injectors?
Fuel injectors spray fuel into a car’s engine using electronic controlled valves, capable of opening and closing many times a second. They have an atomising nozzle that distributes the petrol or diesel evenly, for optimum combustion and efficiency. Injectors were introduced as a replacement for the old carburettor system, since they help engines run with greater fuel efficiency and also help to reduce emissions.
A car generally has one fuel injector per cylinder. So, if you drive a four-cylinder car, it will most likely have four fuel injectors.