一、机械部分故障诊断1.发动机启动困难①油箱内无燃油或低压油路堵塞检查油箱内是否有油,检查油箱内低压油泵或油箱外低压油泵是否转动。如果正常,应从低压燃油进入高压油泵入口处,向低压油泵出口处,逐一松开接头,观察在低 First, the mechanical part of the fault diagnosis 1. The engine starts difficult ① no fuel tank or low-pressure oil line plug Check the tank for oil, check the tank low pressure pump or low pressure pump outside the tank is turned. If normal, should enter the high-pressure fuel pump inlet from the low-pressure fuel, to the low-pressure pump outlet, one by one to release the connector observed in the low