Throttle Body: Description and Operation

DESCRIPTION

The throttle body controls air flow to the engine.

OPERATION

The throttle body is a single-piece die casting made of aluminum,it has a butterfly control valve in the center, that controlls airflow. The throttle body is fitted with a Throttle Position Sensor (TPS). The throttle position is controlled by a single lever and accelerator cable by the driver.

NOTE: The TPS sends a varying signal to the Powertrain Control Module (PCM). The PCM uses the signal to measure throttle valve angle and adjust the air/fuel mixture.