What Causes the Zizzing Sound When Pressing the Accelerator?

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One of the reasons for the zizzing sound when pressing the accelerator is: 1. The engine temperature is too low: When the car starts cold, the temperature of the engine is relatively low, and various parts and fluids have not reached an optimal working environment and state; 2. Lack of engine oil: leading to deterioration of the oil, affecting lubrication, and causing abnormal noises from part friction; 3. Damaged half-shaft: including twisted or broken half-shafts, worn spline teeth; 4. Loose engine belt: causing idle revving when accelerating. The accelerator, also known as the 'throttle' or 'air valve,' refers to the control device that regulates the engine's power (thrust). In piston-type aircraft engines, the throttle controls the carburetor's throttle opening to regulate the cylinder's filling volume, determining the engine's output power. In gas turbine engines, the throttle controls the metered fuel flow of the fuel regulator, determining the thrust produced by the engine.