Wondering if you guys/ girls can help me out any. I have an XE with a 250, I recently converted it from auto to manual, and now everything seems to be dying on me (now that it is getting some revs) The latest problem is its only running on 5 cylinders, I have checked the spark so its not that. There is a huge hole in the muffler, that wouldnt be causing it would it? it still drives ok, any ideas? Will I have to take the head off and have a look? Thanks!! XE-ESP