it's hard to say, I mean you could have a bad cat or a exhaust leak. best option is to take it to a dealership and let them hook up a computer to it. they usually dont charge you for it.
2002 v6 manual, SSM P&P Heads, Comp Cam from SSM, and some other stuff full list in profile.
214 RWHP, 215 RWTQ :tongue
"The trouble with our liberal friends is not that they're ignorant; it's just that they know so much that isn't so"