LIJITHIUM

I changed a broken pneumatic coupler and ptfe tubing and after that I started experiencing horrible prints on my printer. What should I do please help me.. I use a anet et4. And cura slicer.. I tried to calibrate my esteps but the printer wouldn't respond.. So I printed a test cube.. What should I do! In order to get back to printing my minis. If u have a anet et4 pls share ur cura profile.. Ps. Am a noob so pls help me..!

I HAVE AN ANET ET4 MACHINE AND IVE BEEN PRINTING AND USING CURA SINCE AN YEAR NOW, AND I HAVNT EXPERIENCED ANY SORT OF ISSUE AND YESTERDAY WHILE SLICING A BENDER HEAD. I SAW THESE WIERD ARTIFACT COME UP HAD NO IDEA ABOUT IT. IF U LOOK CLOSELY THE SCLIED MODEL HAD HUGE HOLES THAAT REACHED TILL THE INFILL CAN ANY ONE PLEASE HELP ME OUT