idle when shifting from Park to Drive

Hi
i have a '92 GA V6 3300 there's to thing strange with my idle.
First, when i start the car, the idle take always at least 3 seconds before being stable.Second, when i put the transmission the Drive From the Park, the rpm goes quickly to almost 2000rpm:screwy: and go back to ~800rpm

anyone got an idea of what is my trouble ? :confused:
thanks

It sounds like your Idle Air Control motor is dirty. Cleaning it and the throttle body should solve it - hit back if you want further instructions

where it's located on my car ? and how i clean it?

thanks

Where is located the IAC Motor on my engine ?
thanks

O sorry I never saw the reply. On the 3.3, it is located above the throttle body. First, buy a can of throttle body cleaner and some paper towels. It should be held onto the side of the throttle body by two star-bit screws. Remove them, and unplug / remove the IAC motor. First, clean the hell out of your throttle body and the IAC motor cavity left by it when you removed it. Pull up the throttle plate and stick some paper towels in there, and clean the living hell out of the inside of your throttle body and IAC motor cavity, repeatedly cleaning / wiping with throttle body cleaner until everything is clean. Remove the paper towels (make sure you don't leave any in the throttle body!!!). Now time to clean the IAC motor. Make sure you only use throttle body cleaner on the spindle itself - it's too harsh to spray directly into the motor. Just keep spraying / wiping the spindle, and especially the rubber part at the end. After this is clean, put everything back together, and you should be good.