Auxiliary Air Regulator

Remove auxiliary air regulator and connect ohmmeter leads to regulator terminals. Ohmmeter reading should be 30-33 ohms. Blow through regulator with compressed air; passage must be open when engine is cold. Connect battery voltage to both terminals. As temperature increases, opening in regulator should become smaller. If ohmmeter reading is incorrect or if regulator fails to close with voltage applied, replace auxiliary air regulator.