What Causes the Exhaust Pipe to Make a Puffing Sound and Shake?
2 Answers
The reasons for the exhaust pipe making a puffing sound and shaking are: 1. The air-fuel mixture is too rich, and unburned mixture enters the exhaust pipe, encountering fresh air and causing backfire; 2. Poor valve sealing, leading to incomplete combustion; 3. Some exhaust valves are eroded or have poor sealing; 4. Carbon deposits at the contact surfaces between some intake/exhaust valves and their seats; 5. Some valve lifters have no clearance, or the two idle ports of the dual-barrel carburetor are unevenly adjusted or clogged; 6. The exhaust pipe is damaged, unable to muffle noise or purify emissions. The maintenance methods for the exhaust pipe are: 1. Avoid water entering the muffler when driving in rain or washing the car; 2. Regularly clean dirt inside the exhaust pipe.
I noticed that the exhaust pipe is making a popping sound and shaking. The most common cause is uneven ignition in one of the engine's cylinders, such as due to worn spark plugs or poor electrical connections, leading to rough engine operation and causing the exhaust pipe to vibrate and produce noise. It's like when one piece of firewood won't burn properly while cooking, making the whole pot of soup wobble. If ignored, other engine components like the catalytic converter could be damaged, leading to more expensive repairs. While driving, the car body may sway, affecting handling and making it especially unsafe at high speeds. It's best to stop and check the spark plugs or go directly to a reliable repair shop for diagnosis, using diagnostic tools to quickly identify the issue. Older cars are more prone to this problem, as carbon buildup or humid environments can accelerate it. Regular maintenance of spark plugs can prevent such issues.
