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Description & Operation: Notes

NOTE: Light Duty Emission vehicles are those vehicles whose Gross Vehicle Weight (GVW) does not exceed 8, 500 lbs.

The catalytic converter (s) is installed in the exhaust system in front of the muffler so that all exhaust gas must pass through the converter (s). The converter is a stainless steel muffler shopped device that reduces exhaust emissions. The catalyst reduces hydrocarbons (HC) and carbon monoxide (CO) emissions. The material inside the converter is one of 2 types: a coated 1-piece honeycombed block (monolithic type), or small beads of catalyst-coated material.

Fig 1: Cutaway View of Monolithic Catalytic Converter Chrysler Corp. Shown, Ford is Similar
G09337117Courtesy of GENERAL MOTORS COMPANY
NOTE: Use unleaded fuel only on vehicles using catalytic converters. If leaded fuel is used, the Tetra Eythel Lead will coat the palladium, platinim and rhodium, rendering these catalysts inoperative. If this happens, the converter must be replaced.