Is there a hole in the middle of three-way catalysis, and the white side is blocked?

Method for judging blockage of three-way catalytic converter;

1, the acceleration of the car is weak, and it is difficult to improve the engine speed and speed. This is because the poor exhaust leads to the reduction of air intake and engine power;

2. Automatic vehicles are forced to downshift frequently. Because the engine power is reduced due to the exhaust blockage, in order to make the car have more power output, the driver must step on the accelerator deeply to make the throttle fully open, so ECU controls the automatic transmission to downshift forcibly according to the opening state of the throttle.

3. There is slight backfire when the engine refuels. When the engine exhaust is not smooth, part of the exhaust gas will stay in the cylinder, diluting the mixed steam and slowing down the combustion speed. When the intake valve is opened, the mixed steam is still burning. Therefore, the mixed steam of combustion will enter the intake pipe reversely through the open intake valve, causing backfire.

When the engine is accelerating or closing the throttle, you will hear the exhaust pipe "crash". This is mostly a symptom of the damage of the three-way catalyst, which is easy to cause engine exhaust blockage;