my 1992 stealth R/t twin turbo it will start up sound perfect and idle at 1,500 rpms then once it gets warmed up and i drive it for like 10 min it will start to idle below 500 rpms and some times it will just die can any one tell me why this would be doing that?

I would say your IAC is starting to go bad...

Stealth 316

Is the IAC expensive to replace and can i replace it my self? Also what is a IAC?

It is between 3 and 4 hundred bucks. Very easy to replace. Check the link I provided, it give detailed instructions on how to replace.

Rockville Mitsu
This dealer is very reasonable on their prices.

Thanks for all your help

I got a rebuilt one from ECMtogo.com for $145. Works great.

would your car run fine when u pressed the gas? and when u went to stop the rpms would go really far down then just die some times?

is there any thing else that any one could think of that it could be other then the IAC?

Yeah, after it warmed up the idle would be really low, sometimes stalling, but ran great otherwise. The IAC is easy to test with an volt/ohm meter. There are six connections (two rows of three). The resistance between the center connection and each side should be about 30 ±2 ohms. On mine I had one connection that would not read at all. (I did verify the new one before I installed it.) test both the top and the bottom row.

yea thats what mine did too.