Capitalfear

Gentlemen! good day, I installed the stillen supercharger on my 350z. my buddy broke the evap sensor in the process. Otherwise, I am convinced we have done everything correctly.
The car idles anywhere between 1100-2500, (which is a step up from when I first installed it, as it would just sputter out after a few seconds after the warm up sequence.) The ECU has been "learning" how to idle again (I'm old school and didn't know that was a real thing, sue me.)
It's nowhere near perfect, but I have replaced the evap sensor with a new one from autozone (I bought the nicer of the models they had available because I was tired of d*ckin around with it.) it is still getting the error code.
The cylinder misfire code...I don't know where to start with it. I compression tested all 6 prior to the install, where EVERYTHING was working. To my knowledge, the only variables have been the S/C kit, and the new evap purge.
Any help, guesses, or light jeers containing nuggets of wisdom would be greatly appreciated. thanks much everyone.
*edit* I forgot to mention, my exhaust has a slight crack that may or may not be sealed after the cats.