What is the method for cleaning a three-way catalytic converter?
2 Answers
Cleaning a three-way catalytic converter involves the following steps: 1. Start the engine and let it run until the water temperature is normal, then turn off the engine; 2. Pour the cleaning solution into a specialized device, and connect the device's output connector to the vacuum tube; 3. Start the engine again, maintaining the speed at around 2000 rpm, then open the flow control valve to slowly drip the cleaning solution into the intake manifold; 4. After cleaning, keep the engine running for 3 to 5 minutes. The reasons for cleaning a three-way catalytic converter are: 1. Sulfur and phosphorus in gasoline form chemical complexes on the surface of the converter; 2. Heavy urban traffic with frequent stops and starts leads to incomplete fuel combustion, which deposits on the converter's surface; 3. Carbon deposits and particles from cleaning the fuel injectors, throttle body, or intake manifold can contaminate the three-way catalytic converter.
The most common method for cleaning a catalytic converter is using specialized chemical cleaners. I've done it myself a few times, mainly by purchasing fuel additives that you pour into the fuel tank before refueling, then driving normally for several dozen kilometers to allow the cleaner to dissolve carbon deposits through the exhaust system. It's simple and cost-effective, with online purchases costing just a few dozen yuan per can, suitable for mild clogging. For severe carbon buildup, it needs to be removed and cleaned with ultrasonic equipment, but that's a professional job and can easily damage the ceramic core. Remember to check if the car is shaking or experiencing increased fuel consumption before cleaning, as these are signs of clogging. After cleaning, the exhaust flows much smoother, power is restored, and it can extend the catalytic converter's lifespan by three to five years. Regular maintenance and preventing engine carbon buildup can help avoid this issue.
