雪佛兰乐风发动机怠速异响故障现象:发动机怠速时有“噌、噌……”的异响。检测分析:用听诊器听异响来测发动机前部的轮系,但是各处都可以听到异响,无法确定异响产生的具体部位。尝试在外面的传动皮带上浇水,无效;为了确定是传动皮带轮系还是正时皮带 Chevrolet Lova idling abnormal phenomenon: when the engine idle “miso, miso ...... ” abnormal sound. Detection and Analysis: listen to abnormal sound with a stethoscope to measure the front of the engine gear train, but can hear abnormal sound everywhere, can not determine the specific parts of the abnormal sound. Try to water on the outside of the drive belt, invalid; in order to determine whether the drive pulley or timing belt