True Story.. Friend of mine has a lovely 25+ year old Blue Bird RV.
A few years back he had issues first with his generator than with the main engine.. Called a service guy who found nothing.
Finally I pointed out the Pre-Filter (This unit has two fuel filters) and upon inspection it was covered with "Black Chunks" (Algae) and after a bottle of Algecide. VAROOM he was good to go.
Sounds like the same issue to me.. That said I'm not the diesel expert. in fact that is just about the limit of my knowledge. My brother on the other hand is an expert
๐ Hopefully the algae treatment will fix you up but you may need to replace the filters a few more times. i'd carry spare(s) for now.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times