My buddy's 2007 ls2 vette started misifring after we put speed engineering longtubes on it along with the x-pipe kit, he also put on an exhaust as well. We completely removed the rear o2's, and used the extension harness for the front o2's. We have double checked spark plug wires to make sure nothing is burnt and that they are all the way on, and we have also checked to make sure the front o2's are not burned either. Everything visually checks out to be good. I have gone into hp and flashed a new tune on it, only touching the parameters for the rear o2's.
I am currently leaning into a fueling issue, and maybe its running too rich or too lean, but from what i remember from riding in it in the past, this problem did not occur until after the headers were installed. I will post the log down below. I haven't done very much tuning, so reading the logs and fully understanding them is still in progress, but i am eager to learn it jesus tune v2 better but still slightly missing check fueling.hpl