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故障现象一辆2003款丰田佳美轿车(装配2AZ原装进口发动机),累计行驶里程约30万km,发动机怠速抖动,在怠速和行驶中踩加速踏板,加速踏板有一段空行程,当加速踏板踩到一定程度(约50%左右)时,发动机转速才能提升,导致轿车不能正常行驶。故障诊断首先检查轿车的起动性能,正常;由于该车缺乏正常的维护,针对怠速不稳的故障现象,先清洗了电子节气门和喷油器,但洗好后试车,故障依旧;用丰田专用检测仪(IT-Ⅱ)读取故障代码,没有故障代码储存;进行断缸试验,发现第2缸和第4缸工作不良。继续检查发现,第2缸和第4缸的点火线圈漏电,火花塞型
Fault phenomenon A 2003 Toyota Camry sedan (2AZ original imported engine), accumulated mileage of about 300000 km, the engine idle jitter, idling and driving in the accelerator pedal, the accelerator pedal has an empty trip, when the accelerator pedal to step To some extent (about 50%), the engine speed can be increased, resulting in the car can not drive normally. Fault diagnosis First check the starting performance of the car, normal; due to the lack of normal maintenance of the car, for the phenomenon of instability instability, first clean the electronic throttle and injector, but after the test well washed, the fault still; with Toyota Detector (IT-Ⅱ) read the fault code, there is no fault code storage; broken cylinder test found that the second cylinder and the fourth cylinder bad work. Continued inspection found that the second cylinder and the fourth cylinder ignition coil leakage, spark plug type