I just put a down pipe on my 2016 vt and now it’s throwing p0300 p0301 and p0302. And when it does that my car starts to run like shit. But all I have to do is shut it off turn it back on and it’s fine again. I also have a ram cold air and bov. I changed the plugs and valve cover gasket bc when I pulled the first plug there was oil on the threads. It’s still doing the misfire thing. It never did this before the down pipe. Is this because I need a tune or something else?