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故障现象一辆2009款福特嘉年华车(搭载1.5L发动机和4速自动变速器),行驶里程约为10万km,因发动机怠速运转时偶尔会熄火而进厂检修。据驾驶人反映,该车有时在路口等待交通信号灯时发动机会熄火。故障诊断接车后试车验证故障,故障确实存在。发动机起动正常,怠速运转稳定,而在怠速运转约15min后发动机突然熄火。发动机熄火后尝试重新起动,发动机仍能够顺利起动。经询问驾驶人得知,该车已因此故障在其他修理厂进行过相关检查,清洗过进气歧管、喷油器和发动机燃烧室;对换过发动机控制模块(PCM)和电子节气门(ETC);更换过火花塞、汽油泵、汽油滤清器、空气滤清器和空气流量传感器(MAF)等,故障均未排除。连接IDS读取故障代码,无故障代码存储;查看相关数
Symptom A 2009 Ford Fiesta (with a 1.5L engine and a 4-speed automatic transmission) has a mileage of about 100,000 km, which is brought into the factory for maintenance due to occasional flameout when the engine is idling. According to the driver, the car sometimes stalls while waiting for a traffic light at an intersection. Troubleshooting After the test car to verify the fault, the fault does exist. The engine started normally, idling stable, and about 15min at idle after the engine suddenly turn off. Trying to restart the engine after the flameout, the engine can still start smoothly. Upon inquiry, the driver was informed that the vehicle had been inspected at other repair shops due to the fault, cleaned the intake manifold, the injectors and the engine combustor; the engine control module (PCM) and the electronic throttle ( ETC); replacement of spark plugs, petrol pumps, gas filters, air filters and air flow sensors (MAF), etc., are not ruled out. Connect the IDS to read the fault code, fault-free code storage; see the relevant number