Here's the deal:
I was driving alone as usual and i came to a stop at a light. when i came to a stop the engine was idling rough, so rough that the whole jeep shook.
I figured it may have been a fluke but decided to drive a bit more to determine whether i should abort my intended trip.
every time i took it out of gear the rpm needle dropped to just above 0 and the dead rattle resumed. i drove to a gas station and added a little gas. when i got back in, the engine would not turn with out me giving it gas. so i shot out of the gas station and headed back home, never taking my foot of the gas long enough for the engine to die.
once i got home and took it out of gear the rpms dropped to 0 and the engine died.
i freaked out and detached the battery, cleaned the terminals, let it sit, and then reattached the battery. the problem seemed to disappear.
i drove to an auto part store and grabbed added some fuel system cleaner and filled the tank with gas.
the issue has yet to reappear.