Xiao Xin replaced the original three-way catalytic converter
BeverlyMilne 
8 
Foreword: Three-way catalytic converter is the most important external purification device installed in automobile exhaust system. Its principle is that harmful gases such as CO, HC and NOx emitted from automobile exhaust are transformed into harmless carbon dioxide through oxidation and reduction., catalysis of water and nitrogen. The carrier component of the three-way catalyst is a piece of porous ceramic material installed in a special exhaust pipe. Call it a carrier because it does not participate in the catalytic reaction itself, but is covered with a layer of precious metals such as platinum, rhodium, and palladium and rare earth coating. Therefore, this accessory is really a large piece, because the fuel I added before was not good, which led to the blockage of this accessory. The most direct manifestation is the inability to accelerate. At the normal speed, you are driving one gear lower than before, as if something is dragging you behind. Later, I consulted many friends and experts. The ideal way is to change the parts.
1. Car owner’s small file:
Aika ID: Meteor Shower_007
Car series:2013 Skoda Xinrui
Vehicle age: 7 years
mileage traveled: 126000 kilometers
Maintenance item: Replacement of the original three-way catalytic converter
2. Replacement process
Maybe many friends question why this big item is blocked? That is because the quality of domestic fuel is generally poor, and the fuel contains sulfur, phosphorus and three-way catalysis
The antiknock agent MMT used contains manganese. These chemical components will form chemical complexes on the surface of the oxygen sensor and inside the three-way catalyst as the exhaust gas is exhausted after combustion. In addition, due to the driver’s bad driving habits or long-term driving on congested roads, the engine is often in an incomplete combustion state, which will form carbon deposits in the oxygen sensor and three-way catalyst, which will cause blockages over time. This consequence is still very serious. Not only is it weak to accelerate, but it will also cause the vehicle to fail to be checked due to excessive exhaust gas.
The antiknock agent MMT used contains manganese. These chemical components will form chemical complexes on the surface of the oxygen sensor and inside the three-way catalyst as the exhaust gas is exhausted after combustion. In addition, due to the driver’s bad driving habits or long-term driving on congested roads, the engine is often in an incomplete combustion state, which will form carbon deposits in the oxygen sensor and three-way catalyst, which will cause blockages over time. This consequence is still very serious. Not only is it weak to accelerate, but it will also cause the vehicle to fail to be checked due to excessive exhaust gas.
When I arrived at the store, the young man at the reception gave me car registration information as usual.
Then drive it to the lifting frame and open the cabin cover to remove the parts.
This is the three-way catalytic converter I want to replace today, the spare part I have been waiting for a long time to arrive at.
Let’s take a closer look at the details. The three-way catalyst is mainly connected to the front half of the exhaust pipe and is a relatively precise component.
This is the three-way catalytic converter of my original car. Because it has been used for a long time, it is rusty. The shop master is measuring the size with a vernier caliper and preparing to disassemble it.
The master in charge of maintenance skillfully removed the old three-way catalytic converter. This was the main culprit responsible for the inability to accelerate. It was safe to replace it before the car was inspected.
Finally, the new three-way catalytic converter was installed and fixed, and the job was completed. The master was worried and tried to see if there was any leakage, and everything was very satisfied.
Finally, let’s settle the cost. This time, the replacement is a little expensive. The total cost is 3821 yuan, including accessories and working hours.
3. Summary:
After replacing the three-way catalyst, I tried the car, which made me feel particularly surprised. Xiao Xin seemed to have returned to the power when she first bought it. She accelerated very actively, there was no feeling of delay in shifting gears, and fuel consumption was also reduced. This shows that the previous speculation is correct: a blocked three-way catalyst will cause exhaust back pressure to increase and acceleration will be difficult. Now all problems were solved, and the money was still worth it.
After replacing the three-way catalyst, I tried the car, which made me feel particularly surprised. Xiao Xin seemed to have returned to the power when she first bought it. She accelerated very actively, there was no feeling of delay in shifting gears, and fuel consumption was also reduced. This shows that the previous speculation is correct: a blocked three-way catalyst will cause exhaust back pressure to increase and acceleration will be difficult. Now all problems were solved, and the money was still worth it.
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