What Causes a Diesel Pump to Stop Supplying Fuel?

1 Answers
LailaAnn
07/30/25 10:03am
Diesel pump failure to supply fuel is caused by air entering the fuel line or a malfunction in the governor. The diesel pump operates through the reciprocating motion of the plunger within the plunger sleeve. If any component fails, it can lead to a lack of fuel supply. Below are solutions for a diesel pump not supplying fuel: Check the fuel line: Inspect the fuel line for air. After turning off the engine, immediately loosen the connection of the diesel filter's output fuel pipe to check for air presence. If air is found, it indicates that air is entering from the fuel tank to the fuel transfer pump section. Locate the specific air leak point, clean and unclog the pipeline, and seal the leak. Additionally, if the diesel filter element is positioned higher than the diesel fuel level, the injector is stuck, or the fuel pump lacks pressure, simply adjust the diesel filter element. Replace the governor: Check if the governor is malfunctioning. Its function is to automatically adjust the fuel supply based on the engine's speed. If it fails, it can instantly stop the fuel supply, causing the engine to shut down. Visit a 4S shop for replacement.
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