Why does the exhaust make a sputtering sound and become inconsistent?

[DelLogan]

Exhaust sputtering and inconsistent exhaust flow are usually caused by issues with the exhaust pipe or spark plugs. Below is an introduction to the exhaust pipe: 1. Introduction: The exhaust pipe is part of the engine's exhaust system. The exhaust system mainly includes the exhaust manifold, exhaust pipe, and muffler. Typically, the three-way catalytic converter, which controls engine pollutant emissions, is also installed in the exhaust system. The exhaust pipe generally consists of the front exhaust pipe and the rear exhaust pipe. 2. Angle: The exhaust angle of vehicle exhaust pipes has always been a challenging issue for professional manufacturers. According to surveys, the angle direction of exhaust pipes for sedans and light household vehicles is usually parallel to the ground and facing backward. 3. Drainage: Water dripping from the car's exhaust pipe is a good sign. It indicates that the engine is burning fuel efficiently, and as a result, the exhaust pipe may drip water. This is actually a normal phenomenon.

[AlainaAnn]

I think the exhaust is popping and the emission is not smooth, possibly due to an issue with the ignition system. For example, old spark plugs or excessive carbon buildup could cause a cylinder to misfire, making the exhaust emission uneven. In such cases, you might hear strange knocking sounds or feel vibrations from the engine, and experience weak acceleration while driving. I've encountered this issue a few times, usually when the car has been driven a lot and the spark plugs weren't replaced in time, leading to thick carbon deposits. Don't underestimate this problem—it not only sounds bad but also affects fuel efficiency and safety. The best approach is to remove and inspect the spark plugs to check for worn electrodes or oil buildup. Regular maintenance, including periodic spark plug replacements, can prevent such issues. Generally, inspect them every 10,000 to 20,000 kilometers and replace them with the correct model when needed.

[LolaDella]

When encountering the problem of exhaust popping, it's mostly due to issues with the fuel injection system. For example, if the fuel injector is clogged, the fuel spray becomes uneven, causing unstable engine operation and irregular exhaust rhythms. I've come across many such cases during repairs, especially in older cars or those frequently filled with low-quality fuel, where the injectors get stuck in a dirty state. This can also be related to incorrect fuel pump pressure; slow fuel supply can make the car seem like it's gasping for air. The solution isn't too difficult—first, try adding a bottle of fuel system cleaner to the tank to help clear the blockage. If that doesn't work, consider replacing the fuel injector without delay. Remember, avoid making random modifications to your car; sticking to the original factory settings is the most reliable approach.

[VonAlina]

The exhaust popping sound is mostly caused by a clogged exhaust system, such as excessive carbon buildup inside the muffler. I experienced this with my old car before—the sound insulation layer in the exhaust pipe would get blocked, restricting airflow and causing the popping noise. This can easily lead to intermittent exhaust flow, affecting the engine's smooth operation. Regular maintenance can prevent this, such as checking for leaks or rust at the exhaust pipe joints. If you notice an issue, don't delay—have a professional shop inspect it with an endoscope.

[JourneyLee]

This puffing exhaust condition is most likely caused by a faulty ignition coil, leading to unstable voltage and causing the engine to operate unevenly. As a safety-conscious driver, I've noticed the vehicle vibrates significantly in this state, posing even greater risks at high speeds. It's necessary to check if the coil wiring has aged or replace components to ensure consistent voltage output. Prompt attention can prevent damage to other parts.