Rinsing the catalyst in 5 minutes without removing it from the car with your own hands.

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Catalytic converter for exhaust gases.
Whether to wash with this method or not, everyone decides for himself, it's your choice. I'm just sharing my experience and not imposing my point of view.
I do not force anyone to wash the catalyst in this way, but just tell them how I do it in my personal car.
How to clean the catalyst on a car (on a cold engine). Unscrew the lambda probe and pour 1.5 liters of gasoline into the catalyst, it fills all the pores and dissolves all deposits. We install the lamp probe back, tighten the lamp probe with a key and start the car. The pressure of the exhaust gases will clear the catalyst, and the gasoline residues will evaporate and fly out into the exhaust pipe, and the car will work better.
Advantages of washing the catalyst.
1. Gasoline consumption has become less.
2. Acceleration dynamics has improved.
3. The exhaust has become cleaner, and all exhaust indicators are normal.
4. Technical inspection is all ok.
5. Gasoline in this case acts as a solvent.
Whether to wash with this method or not, everyone decides for himself, it's your choice.
I shared with you how I do it in my personal car.
There are a lot of questions, and suddenly the catalyst will bang or burst, I will answer like this.
Burnt gases enter the catalyst into the exhaust system of the car, and in order for gasoline to ignite, it is necessary that a working mixture of 1/15 be prepared.
That is, 1 part gasoline and 15 parts air, only in this case gasoline can catch fire.
And since there will only be exhaust gas (not burning) and gasoline and little air, and gasoline does not burn without air, then there will be no ignition. Gasoline will not burn, in this case it acts as a solvent.
I shared with you how I do it in my personal car.
My car OPEL COMBO 2008, mileage 339,000 km, the catalyst from the factory and the lambda probe are all native, I did not change anything and did not cut out. I do the flushing after each oil change (on a cold engine). And after flushing, the exhaust inspection is OK. And gasoline consumption is normal.
The catalyst starts working on the car only when it heats up to operating temperature from the exhaust gases. By coming into contact with exhaust gases, noble metals regulate chemical oxidation and reduction reactions, reducing exhaust toxicity.
The catalyst is an abbreviated name. Correctly, this part of the car is called the catalytic converter of exhaust gases. From the name, it can be understood that this device neutralizes the exhaust gases of the car.
The catalyst is an important part of the exhaust system, which cleans the exhaust gases from harmful emissions.
The oil does not consume, but the catalyst becomes clogged.
This may be due to the use of low-quality fuel. If you refuel at suspicious gas stations or use low-octane fuel, the exhaust gases may contain a lot of soot and other impurities. They settle on the surface of the catalyst, clogging its channels.
The reason may also be an incorrect setting of the fuel injection system. If the system is running with an excess or lack of fuel, this leads to the formation of an incompletely burned mixture. It also contains many particles that settle on the catalyst and clog it.
Another possible reason is the use of an oil with a high content of phosphorus or sulfur. These elements also enter the exhaust gases and settle on the catalyst. They can react with precious metals to form insoluble compounds that impair the effectiveness of the catalyst.
Finally, mechanical damage to the catalyst can also lead to its clogging. If the catalyst is subjected to shock, vibration, overheating or freezing, this can lead to cracks, deformation or detachment of the precious metal. In this case, the catalyst loses its performance and may become clogged even more.
With a faulty catalyst, the engine loses power, extraneous sounds appear in the exhaust system, and the exhaust gases smell unpleasant.
The catalyst fails prematurely due to low-quality fuel, ignition and engine malfunctions.
Diagnostics of the ECU with an autoscanner or visual inspection of the cylinders and the catalyst with an endoscope will help to detect the problem.
The original catalyst contains precious metals, which is why it is so expensive.
In the comments, subscribers offer various options for rinsing the catalyst.
Acetone: widely used in industry and everyday life, used in the production of lacquers, paints and plastics, as well as in medicine and cosmetology.
Solvent 646: Suitable for washing engine and fuel system parts, but requires caution due to its high toxicity.
Gasoline: dissolves oils and resins well, but can be flammable.
Alcohol: dissolves fats and oils well, but may be less effective for removing persistent contaminants.
Specialized cleaners: Available in auto parts stores and are designed to clean catalysts and other components of the exhaust system.