When should a fuel filter be changed on a semi?
When should a fuel filter be changed on a semi? They usually require a change every 10,000 to 15,000 miles whereas a modern gasoline fuel filter could go 100K+ miles before a change is needed – if at all. Most diesel truck applications will require 2 diesel fuel filters to be serviced. What's the best way to change the fuel filter? Tried that trick too to no avail. Best guess.....Primer pump seal is allowing air to enter. Remove diesel tank filler cap, using compressed air and blow gun wrap it with a clean rag to form a seal and pressure...