Topaz V6-182 30L (1992) | Fuel Delivery & Air Induction | Throttle Body Description
Throttle Body: Description and Operation
Throttle Body
The intake manifold and throttle body are integrated into a single aluminum casting. Runner lengths are tuned to optimize engine torque and power
output. The manifold provides mounting flanges for the Idle Air Bypass (IAB) valve, Throttle Position (TP) sensor and Positive Crankcase Ventilation (
PCV) tube. Vacuum taps are provided to support various engine accessories.
The throttle body assembly controls airflow to the engine. The throttle position is controlled by a single butterfly-type valve. The throttle position is
controlled by a conventional cable/four bar throttle linkage. The body is a single piece die casting made of aluminum. It has a single bore with an air
bypass channel around the throttle plate. This bypass allows both cold and warm engine idle airflow as regulated by an IAB valve assembly mounted
directly to the throttle body. The valve assembly is an electro-mechanical device controlled by the Electronic Control Assembly (ECA). It incorporates a
linear actuator which positions a variable area metering valve.