Originally posted by JRS:
There is an idle motor on SVT's. It's called the idle air motor or regulator. Look into it it's only $75.00 and it might fix your problem.
It is called the idle air control valve or idle air bypass valve. If it gets dirty and sticky it can cause this kind of a problem. You should clean it, and the throttle body, to see if the problem is diminished. A bad throttle position sensor can cause this too, but usually the upset is more extreme. Ray McNary's throttle hang fix can make a difference too.
