I posted on here a while back, and got some helpful responses. I replaced several parts, to no avail. I finally bit the bullet and went to the dealer and had it scanned, and the problem replicated. Problem turned out to be a bad crank sensor. Bought the new part for $32, installed it myself (about an hour and an 8 & 10mm socket and wrenches) so far, runs perfect and MPGs are back up....again, thanks all for the input and guidence.