随着汽车保有量的不断增长及发动机新技术的不断提高,电控汽油机怠速不稳故障的出现也非常普遍。如何快速、准确分析与判断此类故障也成为困扰许多汽车维修人员的一个难题。论述电控汽油机怠速不稳的故障现象、分类、机理、具体原因,以及诊断程序与方法,旨在为汽车维修人员提供一种分析、诊断电控汽油机怠速不稳故障的思路。 With the continuous growth of car ownership and continuous improvement of new engine technologies, the emergence of electronically controlled gasoline engine idling instability is also very common. How to quickly and accurately analyze and judge such failures has also become a problem for many car maintenance personnel. This paper discusses the phenomena of failure, classification, mechanism, specific reasons, and the diagnostic procedures and methods of the unstable idling of electronically controlled gasoline engine. It aims to provide a thought for automobile maintenance personnel to analyze and diagnose the idle instability of electronically controlled gasoline engine.