What Causes the Popping Sound from the Exhaust Pipe?
2 Answers
Reasons for the popping sound from the exhaust pipe: 1. Issues with the fuel delivery pipeline, abnormal electric fuel pump, clogged fuel filter, or obstructed fuel outlet; 2. Abnormal injectors leading to quality faults, foreign object blockage, poor sealing, or aging rubber rings; 3. Problems with intake or idle control, stepper motor, dirty or leaking throttle body, or abnormal sensors such as atmospheric pressure, temperature, or throttle position. The exhaust pipe's role in the vehicle is to reduce vibration and noise, thereby extending the lifespan of the exhaust muffler system. The main material of the exhaust pipe is stainless steel. Since the car's exhaust creates significant pressure on the engine, the resulting noise can be irritating. The primary noise reduction function is targeted at the car's exhaust pipe. The muffler is installed inside the exhaust pipe, significantly reducing the vehicle's noise.
Having driven for over a decade, a chugging sound from the exhaust pipe is mostly due to an exhaust system leak, such as aging or corroded gaskets at the exhaust pipe joints, causing a puffing noise when exhaust gases escape. Alternatively, it could be an engine misfire, where one cylinder isn't working, leading to uneven combustion and unstable exhaust flow, making the sound louder and rougher. I recommend first checking the exhaust pipe connections and the exterior of the muffler for any looseness or holes. Then, listen to see if the sound gets louder at idle and lessens during acceleration—this can help with an initial diagnosis. Don't delay too long, as it could increase fuel consumption and potentially damage the engine. Always check for safety before hitting the highway. During regular maintenance, spray some rust inhibitor to prolong its lifespan, and avoid parking in damp areas.
