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一辆桑塔纳2000乘用车(采用 AJR 四缸电控燃油喷射发动机),累计行程1.5万 km。其发动机在熄火几小时后难以起动,早晨冷机时起动尤其困难,而且在着火后抖动严重。该乘用车已经过几家维修站检修,仍未能排除。笔者接到该车修理任务后,原以为此类故障很普遍,只要对油路及有关电路进行相应检修,故障应能排除。于是用 VAG1552故障阅读仪对该车进行诊断,发现发动机电控系统无故障代码储存。读取发动机怠速运转时的数据流,并对各组数据进行分析,以期从中分析出故障原因,但各组数据均显示正常。如点火提
A Santana 2000 passenger car (with AJR four-cylinder electric fuel injection engine), a total of 15,000 km trip. The engine was hard to start after a few hours of stalling, especially difficult to start in the cold in the morning, and had severe jitter after the fire. The passenger car has been overhaul maintenance station, still can not rule out. The author received the car repair task, the original thought that such failures are common, as long as the oil circuit and the corresponding circuit maintenance, fault should be ruled out. So use VAG1552 fault reader to diagnose the car and found that the engine electronic control system fault-free code storage. Read the engine idle speed data flow, and each group of data analysis, with a view to analyze the cause of the malfunction, but the data showed normal for each group. Such as ignition mention