Idle Enrichment System: Description

Idle Enrichment System is designed to reduce cold engine stalling by use of a metering system related to the basic carburetor instead of choke. It is used on some vehicles with automatic transmissions and Light Duty cycle emissions. System enriches carburetor mixtures in curb idle and fast idle area during cold or semi-cold operation. System consists of a vacuum idle enrichment valve, coolant vacuum switch or solenoid vacuum switch and electric timer combination.