Welcome
. Take to Autozone or Advance and scan for CEL codes (free service). Then post the exact codes. Yes, the precats and cats (3 of them) can be expensive. You want to be sure before changing anything.
And your other post.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1274123&page=0&view=collapsed&sb=5&o=&fpart=1
No timing belt for V6. Only timing chain. Could be serpentine belt.
A blocked (plugged) exhaust due to a bad catalytic converter could cause sluggish engine performance.
