Originally Posted by pagris
Moonzie is absolutely right - take it to the dealer - if they give you a hassle about it, go to another dealer or call SOA. You have a powertrain issue, no question about it.
I appreciate the input and the comments.
I took the car to the dealer. They got a CEL, so they were able to diagnose the problem. They say its a bad O2 sensor. Its not covered under the powertrain warranty, so I'll have to eat this one. They don't have the part yet, but after they get it and do the fix, I'll post again with info on whether the fix worked or not.