mstang2k6

Eversince i replaced my plenum, intake, and TPS (it through a check egine light so i replaced it) I've had an issue with my rpms jumping when i place my car drive back into park (i have an auto). When I place the car in drive the car idles at about 500-600, when i shift the car into park the rpms jumpt to about 1k and then go back down to about 750; it seems as if the car accelerates when i shift the car into park (this can been seen towards then end of the first clip), anyone have any idea what can be wrong here?

Here's a video of what im talking about (sorry about the bad quality)
YouTube - CIMG3135

And while i was out there i took a small clip of what my exhaust sounds like:
YouTube - Mustang GT - BBK Catted X-pipe and flowmaster catback

grogan

its your iac (idle air control) u can clean it, or take the gasket off and cut where the two holes are and make it one hole and it wont do it no more. my car does it but i aint worried about it.