Quote Originally Posted by gregs78cam View Post
That's funny, I had the same problem with my '7427 in the camaro.....start up, idles good, put in gear and back to P/N and IAC/idle won't come back down, i think mine wouldn't go below 27 steps. I ended up switching to a Big Block bin to start, and all that went away, along with having a better spark map for my application.
A lot of times that is do to "IAC - Position vs Temp" I cut them in half is usually enough.