Search the Community

Been going through fuel lift pumps like candy from my point of view. Going to start a replacement process of the fuel line, lift pump and filters starting tomorrow now that I have procured all the needed parts. Going to replace the 1/4 in. line from the last fuel filter going to the injector pump.- increasing the size to 5/6 in. line and install high flow banjo bolts, that restrict fuel flow from the first fuel filter output all the way to the injector pump input. Will be taking fuel pressure reading after each part is replaced and get some flow rate readings, if my friendly mechanic will let me borrow the flow meter fro a few hrs. I did call Cummins and did not get any real base line information on how long or how many miles there pumps should last. Thinking they have some test stand information and should be running spot checks on the new units being supplied. However, going through 5 of them in 120,000 miles does not make sense as they drop below the specified 10 PSI minimum specification in the engine repair manual . When my big 8.1 L gas powered truck will go 125,000 miles on each pump. I'm not much for making the parts department richer. Rich.