I have a Creality Ender 3 printer, and I have been having continual issues with the extruder motor trying to push the filament through, but it seems unable to get enough torque, and just clicks, acting almost like a ratchet. I have replaced the factory bowden tube and coupler with better quality ones, and the issue is still there. With the new tube and couplers, there is no build up of filament inside the hot end. I am new to 3d printing, and have no idea where to go from here. Thank you for any help that you have to offer.