Hombre S Regular Cab 4WD V6-4.3L (1999)
Throttle Body: Description and Operation
Throttle Body Assembly
Throttle Body Unit
The throttle Body assembly is a downdraft design. The throttle Body is mounted on the intake manifold plenum. The VCM uses the throttle Body in
order to control the air flow into the engine, thereby, controlling the engine output.
The throttle valve within the throttle Body is opened by the driver through the accelerator controls. During the engine idle, the throttle valve is almost
closed, and the Idle Air Control (IAC) valve handles the air flow control.
The throttle Body also provides the location for mounting the Throttle Position (TP) sensor. The throttle Body also senses changes in the engine vacuum
due to the throttle valve position. The vacuum ports are located at, above, or below the throttle valve in order to generate the vacuum signals that are
needed by the various components.
