I installed a 70mm throttle body the other night. Set idle around 600 without IAC plugged in. With it back in, car idled at 900-950 which is higher than I like, but it's steady. I went for a ride and ripped on the car a lot and it start raising rpm when I shifted and idle jumped to 2500. Looked under the hood and a vacuum line had popped off the upper. Put it back and reset the idle again and it was good back at 900ish. After driving a few miles stop and go all of a sudden idle jumped to 2000 or so and was hanging when shifting. I thought the vacuum line had popped off again but it was fine. What could be causing this? I feel like a douche at stops because my car is revving and it feels like cruise control is always on.