故障现象一辆丰田皇冠3.0乘用车(发动机型号为2JZ-GE),在一修理厂清洗过喷油器后发现发动机在怠速时排气管大量冒黑烟,而高速运转时工作却正常的奇怪现象。故障诊断与排除根据传统的诊断方法,考虑到高速工作正常,怠速时才出现排气管大量冒黑烟的故障现象,可能是正常怠速时不该供油的装置在工作,而与之相关的装置只有冷起动喷油器。当接通汽车的故障自诊系统时,故障指示灯亮, Fault phenomenon A Toyota Crown 3.0 passenger car (engine model 2JZ-GE), after cleaning the injector at a garage found that the engine exhaust smoke a large number of black smoke at idle, and high-speed operation is normal Strange phenomenon. Fault diagnosis and troubleshooting According to the traditional diagnostic methods, taking into account the high-speed work properly, idling only when a large number of exhaust pipe black smoke phenomenon may be idle at normal time should not be oil device, and related The unit has only cold start injectors. When connected to the car’s fault self-diagnosis system, the fault indicator light,