1. Gasoline cleaning method: The gasoline cleaning method is a simple and effective method.

First, preheat the engine to normal operating temperature, then add an appropriate amount of gasoline additive, and allow the engine to run at high speed for a period of time to allow the gasoline additive to fully burn and clean the three-way catalyst. Note that this method can only be used on gasoline engines, and should be operated according to product instructions to avoid excessive gasoline additive damage to the engine.

2. Detergent cleaning method: Detergent cleaning method is a relatively mild method.

First, mix detergent with water according to a certain ratio, then add the mixture to the fuel tank, let the engine run for a while, and allow the mixture to enter the three-way catalyst through the fuel system to clean it. It is important to choose a detergent that is harmless to the three-way catalyst to avoid corrosion.

3. Professional equipment cleaning method: If the three-way catalyst is severely clogged, it is recommended to use professional equipment for cleaning.

The professional equipment sprays cleaning agent into the interior of the three-way catalyst through a high-pressure pump to remove the clogging. This method has good results, but requires professional personnel to operate to avoid damaging the three-way catalyst.

4. Prevention first: In addition to regularly cleaning the three-way catalyst, we should also pay attention to the following points to prevent the three-way catalyst from being blocked.

First, avoid driving at low speeds for a long time and maintain the normal operating temperature of the engine.

Second, avoid using inferior fuel and choose regular gas stations for refueling.

Finally, regularly inspect and maintain the engine to keep it in good condition.