THERMACTOR Air System: Notes

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The Thermactor Air System used with Electronic Engine Control consists of the following components:

Air Supply Pump
Thermactor By-pass/Diverter Valve
Dual Thermactor Air Control Solenoids
Exhaust Check Valve
Three-Way Catalytic Converter (COC/TWC)

The efficiency of the catalytic converter is dependent upon temperature and the chemical makeup of the exhaust gases. Air must be provided to the COC catalyst for the oxidation of HC and CO byproducts of the TWC catalyst.