EGR Timer

The EGR timer is a delay system consisting of an electrical timer mounted on dash panel in engine compartment which controls an engine-mounted solenoid. Solenoid is connected by vacuum hoses between carburetor venturi signal nipple and vacuum amplifier. Purpose of timer system is to prevent EGR operation for a short period after ignition is turned on. Time interval is between 35 and 90 seconds, depending upon application. Timer operation is overridden by CCEGR valve. On CTS systems, timing function begins after switch opens to permit EGR operation.