Ming Rui 1.2t hissed when stepping on the accelerator, but not when not stepping on the accelerator. Do you know why? Thank you.

There is abnormal sound when stepping on the accelerator, which may be the sound of the oil pump or related places or the clutch release bearing is broken.

It is necessary to check whether the air intake pipe of the engine leaks, whether the air filter element is installed in place, where the sound comes from, and whether the engine belt is aging, loose and slipping.

At the same time, it depends on where the sound comes from. The right side of the engine is generally the belt of the generator; The word on the left is about the throttle; Most of the front wheel brake pads may be caused by brake calipers, and a small part is stuck. It may be that the piston of the brake caliper was pressed back and crushed when it was installed, which caused a certain degree of jamming.

If the noise is in the clutch, you can pay attention to the wear of the clutch and try to step on the accelerator. If the car runs normally but does not accelerate, this is an obvious slip phenomenon. Most clutch plates are worn very thin. If there is noise, the release bearing of the clutch is likely to be damaged.