Why does the car make a chugging sound?
1 Answers
When idling, the car body shakes noticeably. Observing the exhaust pipe outlet, the exhaust gas flow is clearly intermittent, and the exhaust pipe shakes violently, accompanied by a distinct "chugging" sound. This is mostly caused by the following situations: 1. Engine misfire: An engine misfire mainly refers to one or more cylinders not functioning properly. Common symptoms include: intermittent exhaust gas flow, severe shaking of the exhaust pipe, and a clear "chugging" or "thumping" sound from the engine. This phenomenon is often related to ignition coil failure. 2. Overly rich air-fuel mixture: When the engine's air-fuel mixture is too rich, the symptoms include: difficulty starting the engine; poor acceleration after starting; uneven engine operation; black smoke from the exhaust pipe accompanied by a chugging sound, sometimes backfiring; reduced engine power and increased fuel consumption. This is mostly related to carbon buildup or clogged filters. 3. Cold start: During a cold start, the engine's lubrication is poor, the oil has low fluidity and is more viscous, leading to mechanical wear and noise. Additionally, during a cold start, the coolant temperature is low, and the air-fuel mixture is richer, resulting in incomplete combustion, which can cause engine shaking and chugging sounds. This is generally a normal phenomenon.
