Throttle Body: Description and Operation

Throttle Body:

PURPOSE
The Throttle body, located at the opening of the intake manifold, controls intake air by varying throttle plate opening. Also houses the idle air bypass port and adjusting screw

OPERATION
When the driver operates the accelerator pedal, the throttle valve is opened via the throttle cable. Idle speed is set by adjusting the Idle Air Bypass Screw to vary the amount of air bypassing the throttle valve.