What is a throttle body on a car?

A throttle body is a component of a car's fuel injection system that controls the amount of air flowing into the engine. It is usually located between the air filter and the intake manifold and is responsible for regulating the air intake, which in turn affects the engine's performance and fuel efficiency.

The throttle body consists of a butterfly valve that opens and closes to adjust the airflow into the engine. When the driver steps on the accelerator pedal, the throttle body opens to allow more air into the engine, thereby increasing power and speed. Conversely, when the driver releases the accelerator, the throttle body closes to reduce air intake and slows the car down.

Over time, the throttle body can become dirty and clogged, leading to decreased engine performance and fuel efficiency. Regular maintenance, such as cleaning or replacing the throttle body, can help ensure optimal engine performance.

Some modern cars come with electronic throttle bodies, which are controlled by the car's computer system. These electronic throttle bodies offer more precise control over the airflow and can help improve fuel efficiency and emissions.