Honda 10 Civic has abnormal sound when it catches fire, and the exhaust is accelerated, so it is impossible to turn on the air conditioner.

Because there is water in the exhaust pipe.

The exhaust pipe is full of water. Exhaust valve ablation will lead to air leakage, making the cylinder unable to work normally. In the process of engine operation, you will occasionally have carburetor backfire. If this problem occurs, it must be repaired in time.

Too much water in engine oil will make the mixture of fuel and air burn and produce a lot of carbon dioxide and water vapor. When the temperature is too low, water vapor will condense into water, resulting in abnormal noise in automobile exhaust for a long time.