What Causes Abnormal Noises from the Exhaust Pipe?

[DelAdrian]

Abnormal noises from the exhaust pipe can be caused by the following reasons: 1. Exhaust pipe aging: Caused by the aging of the exhaust pipe, which requires re-fixing or replacing the exhaust pipe. 2. Three-way catalytic converter failure: If the car's three-way catalytic converter malfunctions, it cannot properly purify exhaust gases, leading to blockages and pressure inside, resulting in abnormal noises from the exhaust pipe. In this case, it is necessary to visit a repair shop or 4S store for professional inspection and repair. 3. Car ignition system failure: If the car's ignition system fails, fuel cannot burn normally in the cylinders, causing symptoms such as weak acceleration, easy stalling, and abnormal noises from the exhaust pipe. In this situation, a detailed inspection of the car's ignition system is also required. 4. Abnormal concentration of combustible mixed gas: If the concentration of mixed gas in the engine is too high or too low, it will cause abnormal combustion, leading to abnormal noises from the exhaust pipe. This situation is more complex and requires professional inspection at a repair shop or 4S store.