What Causes the Buzzing Noise When Accelerating a Car?

[AmyAnn]

The specific reasons for the roaring noise from the engine during acceleration are as follows: 1. Exhaust pipe leakage: When there is a leak in the intake or exhaust pipe, the vehicle will produce a loud roaring sound as the exhaust rate increases during acceleration. 2. Dirty or clogged throttle: During acceleration, the engine load increases, requiring the throttle to open wider and more fuel to be supplied. If the throttle does not open to the optimal position due to dirt or clogging, it can result in poor air-fuel mixture ratio, causing noise during acceleration. 3. Engine misfire: An engine misfire refers to one or more cylinders not functioning properly. Common symptoms include insufficient vehicle power, severe shaking of the exhaust pipe, and a clear "popping" or "thumping" noise from the engine.