How to Repair a Diesel Engine That Is Not Injecting Fuel?

[CarsonAnn]

Check whether there is fuel in the fuel tank, whether the fuel has solidified, whether the fuel tank switch is open, and whether the speed control handle is in the middle position. Turn the engine and observe whether there is fuel leakage at the high-pressure fuel pipe and its connection points.

[SanCecilia]

I've been repairing diesel engines for nearly 15 years, and there are essentially three common causes for fuel injection failure. First, check if there's diesel in the tank – sometimes it's simply out of fuel or has water contamination. Next, inspect the fuel line; the pipeline from the tank to the high-pressure fuel pump might be clogged with debris, especially since diesel filters are prone to getting dirty. If the fuel pump is faulty, it needs replacement – pay close attention to sealing during disassembly; I've seen cases where overtightening fuel pipe connectors crushed the sealing rings. Finally, examine the fuel injectors: remove them and test the atomization effect with professional equipment. If stuck, the entire injector must be replaced. Before starting, it's best to check cylinder pressure – insufficient pressure due to piston ring issues can also prevent fuel injection. Regular diesel filter changes can prevent about 70% of such failures.