What causes a hissing sound when stepping on the accelerator?

[DiAllison]

When a vehicle produces abnormal noises upon accelerating, it is often due to excessive clearance in components like the drive shaft, inadequate lubrication, or improper assembly during maintenance, resulting in friction-induced sounds under high torque output. On the right side of the engine, it's usually the generator belt; on the left, it's typically an issue with the throttle valve. Minor noises: Such as sparking sounds from high-voltage electricity leakage or slight looseness in rolling bearings. Generally, these sounds are faint, indicating minor component wear with no significant changes over extended periods. Such issues can be tolerated without immediate repair while maintaining normal vehicle operation. Moderate noises: Such as flywheel bearing sounds or clutch release bearing noises, which noticeably affect vehicle performance but can sustain primary technical functions in the short term. These sounds are usually louder, indicating more significant component wear, and should be repaired promptly.