1, the height of the oil pump is not fed: The reason is that there is air in the fuel system, the oil line is blocked, there is no diesel oil in the fuel tank, the plunger of the oil pump is stuck, and the plunger or the oil valve ring is seriously worn. 2, fuel supply advance angle is wrong. 3, the injector is not working properly: the reason is that the wear of the coupling parts is too large, the spring of the injector spring is broken, the injector valve is stuck or the nozzle is blocked. 4. High-pressure oil pipe leakage; 5. Wrong valve clearance and serious air filter plugging. 6. Insufficient compressive force: The reason is that the intake and exhaust valves leak. The cylinder liner, piston and piston ring are seriously worn and the cylinder cushion is damaged. 7, the starting system is faulty. 8, low temperature, oil viscosity.
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