Printing problem, just started

Howdy all! I have an old Ender 3v2 where the only thing I have upgraded is the yellow springs and aluminum extruder (replacing plastic one that came with it when the arm cracked). I have not had any problems until a month ago.... Any time that I have a print seemingly longer than 2.5 hours, the filament breaks off at the extruder and just creates a spring of PLA. (But, I can print small things...i.e. Benchy....with no problem).

I have put on a new nozzle, replaced Bowden tube, and checked fans to no avail. I still have problems with 3+ hour prints. I know everything is more advanced now, but I really lack the funds for a new printer and would like to get this one running again (It is my first and only printer, and I enjoy printing little knick knacks as well as functional little shelves and brackets and what not). Any advice would be appreciated to check.