How do I know if my John Deere has a fuel system issue?
To check for fuel system problems, look for symptoms like hard starts, sputtering, or no fuel at the injector.
Fuel system issues are a common reason for starting trouble, especially in diesel equipment. Begin by inspecting the fuel tank to ensure it has fresh, uncontaminated fuel. Look for signs of water, algae growth, or sediment in the tank, these can clog filters and lines.
If the engine is cranking but not receiving fuel, check the inline fuel filter for clogs and inspect the fuel lines for cracks or air leaks. On diesel engines, air entering the fuel system can cause hard starts or stalling. If you recently changed a filter or ran the tank dry, you may need to bleed the fuel system.
To do this, use the primer pump or manual priming lever (if equipped) and loosen the bleeder screws at the injectors or fuel rail to release air until you see a steady flow of fuel. Also check the fuel pump and shutoff solenoid for proper operation, they must deliver adequate pressure and remain open during cranking.
In carbureted gas engines, ensure the float bowl is filling and the choke is functioning correctly. A sticking float or dirty jet can restrict fuel flow and cause poor starts.
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