1供油时间过早或过晚的快速诊断1.1敲缸发动机起动后,正常情况下可以听到轻微的金属敲击声。供油过早,可以听到像用硬木锤敲击活塞似的金属敲击声,转速越低越明显,供油越早声音越清脆;供油过晚,敲击声反而不明显。当然,喷油嘴喷油 A quick diagnosis of oil supply too early or too late 1.1 Knocking cylinder Under normal conditions, you can hear a slight metal knocking sound. Oil supply too early, you can hear a hammer like a metal hammer percussion with a hard hammer percussion, the lower the more obvious speed, the sooner the oil supply more crisp; fuel supply too late, the percussion sound is not obvious. Of course, the nozzle fuel injection