Are you having the same fueling issue I am, with it running at 10:1 A/F?
Mine is doing that, and it's actually blackening the tailpipe. My thought is though, maybe chrysler has the ecu set to run that rich for a bit of extra protection from the factory. I've seen *numerous* other cars run pig rich from the factory, but most are high 10:1 to 11.5:1. *shrug*
I'll have to see if i can get a new MAP sensor in there, and if that fixes it, if not i have an AFC-II coming so that'll allow me to take care of that and fatten it up a bit from 3200-3800rpm...