What are the causes of insufficient fuel supply in diesel engines?

1 Answers
JuneRose
07/29/25 6:41pm
Reasons for insufficient fuel supply in diesel engines: 1. Clogged fuel filter. Caused by dirty fuel or low fuel freezing point forming ice blockage in winter. 2. Insufficient fuel transfer pump pressure. This fault can be caused by damaged fuel transfer pump, air in fuel lines, wear of fuel pump transmission parts, or damaged diaphragm in diaphragm-type fuel pumps. 3. Insufficient fuel injector opening pressure. Excessive needle valve spring tension, insufficient fuel injection pump output pressure, or leakage in high-pressure fuel lines and connectors can all make the injector needle valve difficult to open. 4. Poor sealing of the delivery valve. 5. Inconsistent fuel supply angle among cylinders. 6. Overly delayed fuel injection timing. 7. Low fuel quality.
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