Update: after speaking with my indy late last night (I called at 7PM to leave a message at the shop and he picked up, haha ... he is pretty dedicated). He said to come in this morning, and he figured (over the phone) it was an O2 sensor. So I drove it in and he diagnosed it, just as he had suspected. I will be bringing the car on friday to have it put in and will leave it in the garage until then. Thanks guys, for the input.
