96 Stratus 2.4 high idle

My car has decided in the last week that it wants to idle extremely high first thing in the morning when we go to leave for work. Today it was acting like it was going to stall, so the rev's get jumping up and down. At lunch, my girlfriend said that it was extremely rough running and she had to keep hitting the gas cause it felt like it was going to stall. We both work for a parts store and had one of the shop guys take it for a rip, but to no avail, as it ran perfect for him. Anyone have any ideas before I start throwing expensive parts like a TPS or IAC at it?

Is the car tripping any codes?

Oddly enough, it is not yet setting any codes.