What's the clatter of Song pro idling?

The abnormal idle noise of pro in Pacific Auto Network may be caused by the stuck idle control valve, engine water temperature sensor failure, engine computer failure, improper idle speed adjustment, throttle failure, air leakage in the intake pipe, etc.

The abnormal idling noise of the engine may be caused by hydraulic tappets. The most fundamental reasons for abnormal idling noise of the tappets are low oil pressure, aging or loosening of machine foot glue and excessive mixed gas. In addition, when the car starts cold, it will rattle at idle speed.

The abnormal idling noise of the engine may be caused by hydraulic tappets. The most fundamental reasons for abnormal idling noise of the tappets are low oil pressure, aging or loosening of machine foot glue and excessive mixed gas. In addition, when the car starts cold, it will rattle at idle speed.

Aging or looseness of machine foot glue: Machine foot glue is the glue block between engine and frame. Its function is to reduce the vibration and buffer when the engine works and fix the engine. Once these machine feet are aged or loose, the engine will shake, and in severe cases, there will be a "beep" sound. This kind of machine foot glue can only be replaced with new ones.

Excessive mixture: when the engine mixture is too rich, its phenomena are: it is difficult to accelerate after starting, and the engine runs unevenly; The exhaust pipe emits black smoke, the engine is accompanied by a clicking sound, and sometimes a gun is fired; Engine power decreases and fuel consumption increases. This carbon deposit in Dachuan is related to the filter blockage.

Abnormal sound during cold start: when the car is cold started, you will hear the abnormal sound of "da da" from the engine compartment. In fact, this abnormal sound is due to the fact that the oil pressure of the oil pump has not been fully established during cold start, which leads to the failure of lubrication of all components.

(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)