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故障现象一辆2008款一汽大众宝来轿车(采用EA11 1发动机),出现加速不良的故障。检查分析用故障检测仪进行检测,故障检测仪显示发动机系统正常,没有故障代码。接着读取发动机怠速时的数据流,进气歧管绝对压力为336 mbar(1 mbar=100 Pa),节气门开度稳定在3.1%不变,负荷为7.8%。根据以上数据分析,部分负荷时混合气偏稀。仔细倾听时发现,发动机在怠速运转时有轻微的“嘶嘶”漏气声音。经过进一步检查,发现进气管漏气。排除方法更换进气管。
Symptom A 2008 FAW-Volkswagen Bora sedan (EA11 1 engine), the emergence of poor acceleration of the fault. Inspection and analysis with the fault detector for testing, fault detector shows the normal engine system, no fault code. Then read the data flow at idle, the absolute intake manifold pressure is 336 mbar (1 mbar = 100 Pa), the throttle opening is stabilized at 3.1%, and the load is 7.8%. According to the above data analysis, the partial load of mixed gas is lean. Listen carefully and found that the engine idling at a slight “hissing” leak sound. After further examination, it was found that the air intake tube leaked. Remedy Replace the intake pipe.