New Stealth TT, idle questions

[traxxz]

whats up everyone! I just purchased a 92 TT with 53k original miles!!! I havent seen a stealth with such low miles, and I feel fortunate enough to even own it! here are some pics, but my iphone isn't doing her justice :[
My question for everyone is that I have noticed that after the car has been warmed up and the vehicle idles pretty high (between 1500-2000 rpms) Additionally the while driving, when come to a complete stop, once the car is in neutral, the rpms tend to slowly bounce between 1500-2000 rpms, then idling at 2000 rpms. I did a search through the forum and I think it might be that the throttle cable needs adjusting or i might have a vacuum leak. The previous owner replaced the clutch and told me that after the clutch was replaced, the issue came up but never found a good enough reason to have it checked out because the car was a weekend toy. Anyways any help at all would be really appreciated. Enjoy the pics!!!

[eyeluvmy3kgt]

check the throttle cable just to make sure it's not too tight.

it could also be a vacuum leak or a bad isc.

[chargerx3]

nice cluster gauge. i hope it hasnt been tampered with. anyways check out how tight the cable is and readjust it. the idle might have also bumped up on it as well and all that takes is adjusting the stopper screw. on the other hand the constant fluctuation sounds like my tt that had the intake timing off 2 teeth. computer had a hell of a time trying to make the rpms go down. just start playing around with it and go one step at a time.

good luck