MK3S extrusion length very far off
I had a blob form around the nozzle, due to poor bed adhesion, I cleaned it, but then replaced the nozzle and hotend after it was still a mess. In the process, something is causing significant under extrusion. It's almost like the extruder is only moving 10% of what it used to. It doesn't seem to be jammed, the teeth are clean, it's just not moving anywhere near enough filament out of it.
When i heat the nozzle, and move the extruder through the menu, it's very very far off from what i tell it to do. For example, I mark the filament, tell it to push 20mm of filament and then when i measure, only 8mm moves. I can do that over and over and still see only 8mm move. Is there some setting that i could have messed up? I did do a few selftests and possible a calibration after i had replaced parts from the menu. Note, all these test have not been done after generating gcode or anything like that, just using menu driven features.