EGR Time-Delay & Idle Enrichment System

This system is used on some vehicles and consists of an electrical timer mounted on the dash panel in the engine compartment which controls an engine mounted solenoid. The solenoid is connected by vacuum hoses between the carburetor venturi signal nipple and the vacuum amplifier. The purpose of this system is to prevent exhaust gas recirculation for about 60 seconds after the engine is started.