2025R Mystery

[dodge man]

Just reiterate the little filter under the floor board is known for plugging easily. You say you aren’t in a humid environment so you don’t think you have algae. How did you get water in your fuel? If you had water in your fuel you could have algae pop up later. I’m just throwing out ideas.

 

[RjCorazza]

...
Completely agree that it seems starved for fuel. Performs exactly the same as when I had water in the fuel

Easy to say, but if you've had fuel issues in the not too distant past, I would expect water and / or microbial issues to still be the cause of your symptoms.
It may be time to "go big" on the fuel system. Drain, flush, clean, and inspect the tank. Drain and blow out all fuel lines, replace fuel filters (again). After all that, fill with fresh fuel and confirm flow at each break in the system (tank outlet, before and after each filter, and at injectors).
Not familiar with your machine, but if it has a water separator / filter with a shutoff valve, they have been known to either clog up at the valve or some have an inlet screen that is susceptible to the same.
Hope you get this sorted out.

 

[dodge man]

Yes it does have a filter/separator with a valve.

 

[Shawn T. W.]

Only running 25 hours a year, is a lot of time for fuel to just be sitting in the tank ... If not full, easy for condensation to form inside of tank, since you didn't say that you used a biocide... And there was water in the tank, there is a good possibility that the is microbes growing/living in the tiny line where the diesel is floating on top of the water, they actually "eat" the diesel, and there "poop" is what creates the black slime that fills up and plugs the filter(s).

I'd replace the little filter under the floor board again, it looks like this ... Cut off at the purple lines, as it will make it shorter and easier to install, take a picture of your old filter and post here ...

It's also possible that a fuel line/hose is kinked/pinched, restricting the fuel flow.