Ok, so I got the CAT on and the torq and power have mostly come back. In the process I created a leak after the precat on this connecting pipe piece. I will try to get some pics up of it later so maybe someone can tell me what it is called. I also went to change the plugs and the cylinderclosest to the cab had once been stripped out. I found this out trying to put the plug in not getting a bite on it at all and finding the helicoil on the old plug. Somehow this just doesnt sit right. Any ideas on how I can make sure I get the plug in the right depth? I think this may be a bit of the issue as far as vibrations go, not a miss, but close. Oh and the CAT fixed the CEL.