Will Replacing the Catalytic Converter with an Aftermarket One Increase Fuel Consumption?

[Elijah]

Replacing the catalytic converter with an aftermarket one will not affect fuel consumption. The primary function of the catalytic converter in motor vehicles is to filter exhaust gases emitted by the engine, converting harmful substances into harmless ones before releasing them into the atmosphere. How to Determine the Condition of the Catalytic Converter: Visual Inspection. Examine the exterior of the catalytic converter for any damage or discoloration. Scratches, cracks, or other visible damage may indicate prior harm. If there are noticeable gray spots in the center of the converter's protective cover, severe discoloration, or purple marks on the shell, it may suggest overheating issues. Check Engine Exhaust. Place your hand near the exhaust pipe outlet to feel the exhaust flow, which helps determine if the catalytic converter is clogged or if there are exhaust flow issues. Another method is to open the air filter, remove the filter element, and observe if exhaust gases flow backward during rapid acceleration, indicating poor exhaust flow. To assess the TWC (Three-Way Catalyst), also check if the secondary air injection pump is functioning properly. Use an Infrared Thermometer. Compare the temperature difference between the front and rear of the TWC using an infrared thermometer. If the temperature difference between the inlet and outlet of the catalytic converter is less than 10°C, the TWC is likely damaged.