So I’m using a MK8 extruder on a DIY prusa rework. and whenever i try to print, i get the firs layer perfectly, however the second layer and every other layer from there will barely extrude it looks like the filament stops moving and i get these really thin threads with some lumps every now and then.

I cant figure it out, I’ve changed the steps/mm I’ve changed the heat breaker tube, the hot end, the nozzle, I even replaced the extruder with the E3Dv6 which worked exactly the same, but the filament would get stuck every time after an attempt to print.

here are some of my settings:

speed 40mm/s, retract 2 mm, nozzle 0.4mm, first layer temp. 215/60 other layers 210/60, layer height .first layer height 0.4mm

please help me, Ive been stuck on this for about two months now.