The airflow control system consists of a thermosensor, thermodetector, vacuum switch and a control box.
The system determines when the trailing distributor should be used, depending upon engine temperature and speed (rpm). The airflow control system also operates the solenoid on the airflow control valve.
When the engine is cold, the thermosensor sends a signal to the control box which, in turn, activates the distributor. The thermodetector is used to keep the thermosensor from being influenced by ambient temperatures. This ensures easier cold starting and better drivability. The thermosensor and control box are located, in order, beneath the dash, next to the fuse box, and behind the grille.