The exhaust pipe of the car is seriously blocked. How to clear it?

In terms of design, there is no way to clean the exhaust pipe. If the blockage is serious, it should be replaced directly. Let's talk about the influence of exhaust pipe blockage:

1, lack of power, slow speed. Tail gas can't get out, fresh air can't get in, and fresh air can't keep up with the power, which is bound to be insufficient.

2. The number of automatic vehicles forced to downgrade has increased. When the exhaust pipe is blocked and the engine power is insufficient, the driver will step on the accelerator, but the ecu will automatically control the transmission to downshift according to the state of the accelerator.

It is difficult to start the engine. Although the battery is charged, the fuel injection is normal and the compression pressure is normal, it just doesn't catch fire, because it is difficult for fresh air to come in.

4. When stepping on the accelerator or braking in an emergency, the exhaust pipe clicks. In most cases, the main culprit of exhaust pipe blockage is that the three-way catalyst is not cleaned.

So let's talk about the maintenance of three-way catalytic converter:

1. Use unleaded gasoline. The three-way catalytic converter is very sensitive to lead, and if there is lead in the engine oil, it will lead to blockage.

2. Pay attention to maintenance. It's best to clean the throttle every 10 thousand kilometers. If the effect of cleaning the throttle valve is still not good, you need to clean the three-way catalyst.

The engine will not burn urea, and the vehicle urea solution is only reduced as the tail gas of the SCR system, while ensuring the output power of the engine. If the urea level does not drop, a large part of the reason is that the nozzle of urea pump is blocked or damaged because of using inferior urea solution for vehicles or not paying attention when adding urea solution. Jasland is equipped with a special catheter. When filling the vehicle with urea, the catheter must be installed. When filling urea solution, impurities can be reduced from entering the urea tank.

If it is not troublesome, you can try the following methods: grinding the muffler along the weld with a grinding wheel, so that the muffler can be removed from the original weld without damaging its structure, and the carbon deposit can be carefully and thoroughly removed after disassembly. Do whatever you want. After cleaning, butt weld the exhaust pipe as it is, and finally polish and spray paint.