Re: 2006 Chrysler Crossfire at Dealer for extended warranty repairs - plus dealer gre
"the tailpipes are filthy from the fuel burning lean and it smells bad on startup " - like rotten eggs ? That is over rich, not lean. Lean burn will also leave the pipes clean/gray unless you have burned a piston and are dumping oil.
Also if both were really bad you should see a gross difference in the bank 1 and bank 2 sensors all four of which can be monitored simultaneously on my telephone. (see the OBD thread).