Throttle Body: Description and Operation

Throttle Body:

The throttle body is mounted to the top of the intake manifold and houses the fuel injector, fuel pressure regulator, throttle valve, Idle Speed Control (ISC) Motor, and Throttle Position Sensor (TPS). The fuel inlet and return tubes are connected to the throttle body by quick-connect fittings. The throttle valve, controlled by the vehicle operator, via the throttle cable, modulates air flow into the engine during vehicle operation. Fuel mixture, idle speed, and injector pulse width are controlled by the Electronic Control Unit (ECU).