故障1发动机怠速不稳,自动熄火故障现象一辆比亚迪F3轿车,行驶里程为2.6万km,驾驶人反映在平直路面上行驶时,发动机运转正常,但偶尔会出现自动熄火或起动后怠速严重不稳的现象。故障诊断用故障检测仪调取发动机电控系统的故障代码,无故障代码存储。为了验证驾驶人所反映的现象,进行路试检查,由于发动机可以着机且故障发生是间歇性的,因 Failure 1 engine idling instability, auto-ignition failure phenomenon A BYD F3 sedan, mileage is 26,000 km, the driver reflected in the straight road surface running, the engine is operating normally, but occasionally there will be automatic stall or start after the idle speed is serious Instability phenomenon. Fault diagnosis Fault detector to call the engine electronic control system fault code, fault-free code storage. In order to verify the phenomenon reflected by the driver, road test, the engine can be machine and the failure occurs intermittently, because