Vacuum Throttle Modulator: Description

This system consists of a decel valve mounted on the intake manifold, and a throttle modulating diaphragm located at the carburetor base. The decel valve is connected by one hose to an intake manifold vacuum source, and by another hose to the throttle modulating diaphragm. The vacuum throttle modulator is used on some Federal Cherokee, Wagoneer and Truck models with V8 engine.