Air Management System - Pressure Operated Electric Divert/Electric Switching (V8 "F" & "Y" Bodies)

When engine is cold, port solenoid should be energized, allowing airflow to exhaust ports.
When engine is warmed up, port switch is de-energized (off) and converter solenoid should be energized, forcing airflow past the converter valve to the catalytic converter.
On the divert mode, both solenoids are de-energized, which opens the converter valve, allowing air out to divert/relief tube to atmosphere. If valves are not operating as specified, check circuit to solenoids. Repair or replace components as necessary.