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故障现象一辆2003年产别克凯越车,累计行驶里程约为15万km,出现发动机怠速易熄火的故障现象。故障诊断接车后首先验证故障现象,属实。经询问车主得知该车在其他修理厂清洗过节气门和喷油器,但故障没有排除。利用故障检测仪读取故障代码,无故障代码存储。读取相关数据流发现,发动机怠速状态下进气压力为95 kPa,正常应该在30 kPa左右。根据检查结果对进气歧管绝对压力传感器进行检查。
Symptom A 2003 Buick Excelle car, the cumulative mileage of about 150,000 km, the engine idling prone to failure phenomenon. Fault diagnosis After the first verification of the fault phenomenon, is true. Upon inquiry, the owner learned that the car had cleaned the throttle and injector at other repair shops but the malfunction was not ruled out. Use the fault detector to read the fault code, fault-free code storage. Read the relevant data flow found that the inlet pressure of the engine idle state of 95 kPa, the normal should be about 30 kPa. Check the intake manifold absolute pressure sensor based on the inspection results.