The process requires several steps:
1. Refuel: This is the most obvious step. Completely refill the tank with the correct type of diesel fuel.
2. Prime the System (if necessary): Some diesel systems have a manual priming pump or a lever on the fuel filter housing. This helps to draw fuel from the tank and fill the fuel lines. This step's importance varies greatly depending on the vehicle's fuel system design. Newer vehicles with electronic fuel injection often handle this automatically.
3. Bleed Air from the Fuel System (if necessary): Air in the fuel lines will prevent the engine from starting. Many diesel systems have bleed screws on the fuel filter and/or fuel injectors. These screws need to be loosened and cranked until fuel flows freely from them, then tightened. Consult your vehicle's manual for the exact procedure.
4. Attempt to Start: Try starting the engine. If it doesn't start immediately, repeat the priming and bleeding process if needed. You may need to crank the engine for a longer period than usual to build pressure.
Important Considerations:
* Low Fuel Light: Never let your diesel engine get so low on fuel that the fuel pump sucks air. Running out of fuel can damage the fuel pump, which is an expensive repair. The low fuel light is there for a reason.
* Consult Your Vehicle's Manual: The specific priming and bleeding procedures vary significantly depending on the make, model, and year of your vehicle. Always refer to your owner's manual for the correct steps.
* Professional Help: If you've tried these steps and the engine still won't start, it's best to call a qualified mechanic. There may be a more serious problem.
* Fuel Filter: If you have recently replaced the fuel filter, the priming steps are absolutely essential.
