What Causes the Abnormal Noise When Accelerating the Engine?
1 Answers
Engine buzzing noise may be caused by engine failure or exhaust pipe leakage. Here are the specific details: 1. One situation that can cause engine buzzing is when the car is in the wrong gear while driving. A mismatch between the car's speed and gear can lead to engine buzzing, but this is not an engine fault. The noise will disappear when the car's speed matches the gear. 2. During driving, the engine's load increases, requiring the throttle opening to be increased and more fuel to be supplied. If the throttle is dirty or not opened to the optimal position, it can result in poor mixture ratio inside the engine, causing a buzzing noise during acceleration.