Idle Tracking Switch

Idle tracking switch, located on carburetor, is a mechanically operated electric switch held open by throttle linkage when throttle is closed and is used on Extended Idle Air By-Pass System.

When idle tracking switch is opened, EEC Module is signaled to de-energize normally closed solenoid. When this happens, vacuum is removed from normally closed by-pass valve and causes thermactor air to be dumped into atmosphere.