Why does the Sagitar make a humming sound when accelerating?

[Kathleen]

Here are the reasons for the humming sound during acceleration: 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 valve: During acceleration, the engine load increases, requiring the throttle valve to open wider and more fuel to be supplied. If the throttle valve does not open to the optimal position due to dirt or clogging, it can result in poor air-fuel mixture ratio in the engine, causing noise during acceleration. The roaring sound of a car engine is usually associated with modified cars and sports cars. For ordinary family cars to achieve such an effect, it would require wear and tear on the vehicle (such as revving the engine in low gear to make it spin at high speed without load).