[Dave Coyle]

I don't know if this will help you but my son-in-law has an 03 Tahuo and had the same problem and it ended up being one of the 4 O2 censers. The thing ran like S@#T, missing and running black soot out the rear exhaust. I really thought it was something worse then that! 3 days in the shop and $300 later, she runs like a dream. As I said, not sure if this will help but if you have not checked the O2's out, it may be worth doing. Good luck.