The throttle body of a vehicle functions as a belt as part of the engine’s air intake system, and it is useful in controlling airflow into an automobile’s engine. As with any complex part, the function performed by the throttle body requires almost every component to work seamlessly together. A throttle body has a throttle plate, also known as butterfly valve, which has the ability to be opened as well as closed. The throttle body also has to adjust fuel intake to ensure the optimum ratio during combustion. While a driver revs the engine, there is increased airflow to the engine (which serves as air for combustion). Because of the close interdependence backed up by the relationship between throttle body fuel intake and throttle body air intake, this is very vital in determining engine performance.