What are the folk methods to determine if a three-way catalytic converter is clogged?

[OEthan]

The following are folk methods to determine if a three-way catalytic converter is clogged: 1. Check whether the voltage of the front and rear oxygen sensors of the three-way catalytic converter is consistent: if they are consistent, it means the three-way catalytic converter is damaged, that is, it is clogged or burned out due to engine misfire. 2. Feel the airflow: put your hand near the exhaust pipe to see if you can feel the airflow. If you can't feel it, it means it's clogged. 3. Temperature difference: judge whether it is clogged by sensing the temperature difference before and after the three-way catalytic converter. Causes of three-way catalytic converter clogging: 1. Gasoline: high sulfur content in gasoline can easily form chemical complexes in the three-way catalytic converter, causing clogging. 2. Engine oil: long-term use of engine oil containing sulfur and phosphorus antioxidants can easily cause clogging of the three-way catalytic converter. 3. Road conditions: since the most incomplete combustion products are generated during acceleration and deceleration, long-term driving on congested roads can easily cause clogging of the three-way catalytic converter.