What are the symptoms of a dirty diesel fuel filter?

1 Answers
TimothyDella
07/29/25 2:35pm
Diesel fuel filter symptoms include a significant drop in engine power. The primary function of a diesel fuel filter is to remove solid contaminants (such as iron oxide and dust particles) present in the fuel, thereby protecting components like the fuel pump, injectors, cylinder liners, and piston rings. This not only substantially reduces wear but also prevents clogging issues. Currently, diesel fuel in China contains relatively high sulfur content. Without a diesel fuel filter, sulfur would directly react with water to form sulfuric acid, which can corrode internal engine components. Therefore, diesel fuel filters play a critically important role (with water separation primarily achieved through sedimentation).
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