Stop printing (Ender 3)

[LupaShiva]

Hello everyone

First time i post here, and hope i can get some help, i have a creality ender 3, wich i already made some upgrades, changed the bed to a glass one, changed the tube, and last week i noticed it stopped printing and changed the noozle for the first time, but now its giving me some problems:

-Sometimes it stops mid printing and its weird because the noozle is new, and when i pull the filament it comes out easy, but with a small mark on the point.
-The noozle temperature, changes alone, sometimes it starts at 205, then i change to 185, and sometimes it increases alone to 195, is this normal? only started happening since i changed the noozle.
-I think this is happening because of the extruder, its the stock one, and filament its almost ending, so maybe it forces the extruder.

Thank you and sorry for my english
Luis Ramos

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