Originally Posted by user name
I believe the precat O2 is inside the front of the cat on that truck so they would have needed to relocate it in front of the new cat to get the right kind of reading out of it.
Thats some of the problem. When changing them to a new one, I figured out that the Pre cat O2 is behind the cat now, and I cant find the wires or anything for the Post Cat O2. Plus they are in seperate pipes now because the dumb ass wanted "true" duals. I'm just really guessing, I was just wondering if someone could shed light on it, and if possable someone had a schmatic or something to go on.