Catalytic Converter

Proper emission control is accomplised with special catalytic converters used with the Computerized Engine Control (CEC) system. A COC pellet-type converter is used with all 6-cylinder engine exhaust systems except California "CJ", Scrambler, Cherokee, and Wagoneer models. These vehicles use a dual-bed COC and TWC monolithic-type converter with "downstream" air injection. The injection of air between the 2 beds provides more complete oxidation of air and CO in the closed loop mode. In order for these converters to be effective, precise control of the oxygen content of gases entering converter is necessary. This is accomplished by the oxygen sensor, MCU and feedback carburetor.