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故障现象 一辆奥迪五缸轿车行驶8万km后无怠速。 故障检查 检查时发现:车辆启动后,高速行驶基本正常,但车跑热后,高速时偶尔出现发动机转速瞬时急剧下降的现象,每当发动机转速低于2000r/min时即熄火。测量点火提前角燃油分配器,保持压力和系统压力均正常,怠速稳定阀和冷启动阀均正常;打开空滤器盖子,用手将空气计量盘向上微微托起,发动机即有怠速,手一松就熄火;调整CO
Symptom An Audi five-cylinder sedan without driving after 80,000 km idle. Fault inspection check found: the vehicle started, the high-speed travel basically normal, but the car running hot, occasionally high-speed engine speed occasionally a sharp decline in the phenomenon, whenever the engine speed is lower than 2000r / min when the flame. Ignition advance angle measurement fuel distributor, to maintain the pressure and the system pressure are normal, the idle speed stability valve and cold start valve are normal; open the air filter cover, hand up the air metering plate slightly upward, the engine that is idle, the hands of a loose Turn off; adjust CO