故障现象一辆2006年出厂的别克君越车(装备LE5可变正时VVT双凸轮轴发动机),车主反应该车在行驶过程中听到“铛铛”两声响后,发动机故障灯点亮,发动机熄火。于是车主将车慢慢靠边,再次起动车辆时,发动机无法着机。故障诊断接到车主电话后,笔者立刻赶赴现场。到现场后,起动车辆,发现起动机运转正常,只不过感觉发动机运转阻力很小,怀疑没有气缸压力。于是将车拖回厂里作进一 Fault phenomenon A 2006 Buick LaCrosse car (equipped with LE5 variable timing VVT double camshaft engine), the owner of the car in the course of the hearing “clang ” two sound, the engine fault light is lit , The engine stalls. So the car owner slowly by the side, start the vehicle again, the engine can not be held. Troubleshooting received the owner phone, I immediately rushed to the scene. After arriving at the scene, the vehicle was started and the starter was found to be operating normally. The feeling was that the resistance of the engine was small and there was no doubt that there was no pressure on the cylinder. So drag the car back into the factory for one