福特全顺换挡时马达转速降低清洗一下节气门。
发动机怠速突然降低原因如下:
1、交流发电机怠速发电量不足导致电磁干扰
怠速发电量不足会导致交流发电机非线性信号失真,产生的电磁干扰会影响喷油器,导致怠速时发动机有轻微抖动,起步后恢复正常。
2、发动机转速在1500r/min以下时动力不足
发电机非线性信号失真有时会影响爆燃传感器,使爆燃传感器错误地发出爆燃信号,导致发动机点火提前角推迟过多,造成发动机在怠速和小负荷时明显功率不足,引发怠速抖动和小负荷时加速不良。
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