一辆BJ7250EL切诺基越野车,行驶1万余千米后,耗油量突然增大,急加速时,排气管冒黑烟。检查分析由于该车无故障检测仪接口,因而采用自诊断方法检查。起动发动机,短接发动机左后侧自诊断黄、白线接头7s以上,提取的故障代码含义为凸轮轴位置传感器不工作。检查分电器上的凸轮轴位置传感器,发现该传感器连接器虚接,用力插实后试车,急加速时已无黑烟。后据用户讲,该车行程每100km体积油耗在10L以下,符合其标称耗油量。 A BJ7250EL Cherokee SUV, traveling more than 10,000 kilometers, a sudden increase in fuel consumption, rapid acceleration, the exhaust pipe black smoke. Inspection and Analysis Due to the car trouble-free detector interface, thus using self-diagnostic method of inspection. Start the engine, short-circuit the left rear self-diagnosis engine yellow, white line connector for more than 7s, extraction of the fault code for the camshaft position sensor does not work. Check the distributor on the camshaft position sensor and found that the sensor connector virtual connection, hard to test after insertion, no acceleration of the dark smoke. According to the user, the car mileage per 100km fuel consumption below 10L, in line with its nominal fuel consumption.