How do I adjust the idle?

[jdeprima]

I just cleaned the throttle body on my '99 GTZ, and now she's idling strange. She's revving up and down between just under 1000 RPM and just over 1000 RPM. I remember reading something about adjusting the idle after cleaning the TB, but I don't remember where I read it. Can anyone help? Also, how hard is it to change the AT fluid on my car? I don't want to pay $70 to have it done, if I can do it myself. (As you can tell, I don't have whole lot of mechanical experience)

[Prophet]

You can adjust the TB cable but not that actual TB. Your going to want to take it in. It needs to be adjusted by a computer or something like that.

[Gilhuly]

You have a leak of some sort somewhere. Do not adjust the idle.

[clone2020]

I have the same damn problem. Unstable Idle.

It only happens when the engine is cold but when the engine is warmed up, the idle problems go away.

Someone mentioned a defective thermostat but I haven't had time to check it.