Hey so I bought a Ender 3 v3 plus over a year ago. I have had almost zero problems so far, until now. I noticed I had layers that were missing. Eventually it got worse and I tried printing a test benchy that came on it. It was terrible! It printed the first few layers then was a stringy mess! I tried just letting it extrude and noticed it would pause a second then continue. I took it apart then got a new nozzle. The extruder gears were slightly caked but not bad. I cleaned it, put it back together, and tried some brand new filament. The new filament was sunlu matte pla. I tried printing the benchy that came on it again, it to was terrible. I noticed that the gears were super caked again. I realized that it was printing at 600mms. The filament said the max speed was 300mms. I changed settings and printed a test print. It was great. I changed filament types in creality print to the filament I used for the test. It was good but had another mess up eventually. I noticed the gears were a little clogged again. The only thought I had was maybe creality print doesn’t change the speed when you change the filament type on a previous file. I’m not the best with all this stuff. Anyone have any suggestions?
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The speed is set in 2 places in the slicer: On the speed tab and in the filament profile under max volumetric speed. Make sure you are not running 20+ for the later - I accidentally did that once 
Creality print does adjust speed but I think the filament profile is what takes precedence.
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