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故障现象一辆斯柯达(SKODA)乘用车,其发动机的排量为2.0L。发动机大修后出现冷车怠速不稳;冷却液温度达正常工作温度后,怠速状况才有所好转,但坐在车内有明显抖动感。检查排除检查表明,各线束、线束连接器及真空管等均无故障。用OB91对发动机电控系统进行检测,无故障代码。显示的动态数据流表明,各传感器信号正常。逐缸断火时发现,只有使第2缸不工作时,发动机转速没有明显的变化。对
Trouble phenomenon A SKODA passenger car, the engine displacement of 2.0L. After the engine overheating, the idle speed of the cold truck was not stable. After the coolant temperature reached the normal operating temperature, the idle speed condition improved but the vehicle was obviously jittery. Inspection Exclusion Inspection indicates that there is no problem with the harnesses, harness connectors, and vacuum tubes. With the OB91 on the engine electronic control system for testing, no fault code. The displayed dynamic data flow shows that each sensor signal is normal. By cylinder off fire found that only when the second cylinder does not work, there is no significant change in engine speed. Correct