B150 1/2 Ton Van L6-225 3.7L VIN E 1-bbl (1982)
Vacuum Delay Valve: Description and Operation
Description
This system was 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.
