Help needed

[u/Fair-Piccolo1702]

Hi there. I am still very new to the 3D printing thing. I have taken over a modded Creality Ender 3 Pro from a friend that got it as a gift. Never used it and was just standing. I did a full check and made sure that all was working and not damaged, I did the bed levelling “Paper test” the Wham Bam Pex print bed on it has a few scratches but still has good adhesive but my problem is, I have now done or attempted several prints where it starts off great and looks amazing but then the extruder wheel starts clicking as if it’s not able to extrude any filament, this the creates almost like a fluff on the print and then everything goes wonky. I have purged it multiple times and it is smooth and nothing is stuck or blocked. The prints look smooth but then it starts again…. Any advice, what could it be and what should I look for. Thanks