sounds like a monster cam....

All of a sudden, my car "sounds" like its got a monster cam in it..... everytime you start it, it wil do this for about 30 seconds to sometimes a minute or so....then all of a sudden, it will idle up a little and run smooth as glass. Anysuggestions? It doesnt matter if its hot or cold, everytime you start it it does this.

Thanks Rick.... I adjusted everything when it had the other computer in it.... gues I need to re-adjust some things...

Well, bought a new IAC, still does it. trying to get the bugs out of this befor the blower goes on. . . its NOT surging,just sounds like a prostock cam...LOL which "sounds" good, but it aint cool....hahahaaa
When it is sounding like a pro-stocker, its kinda running rich too. Then it will idle up a tad, then run as smooth as glass. Done went over the entire thing again, still doing this, TPS is where it needs to be....I had a 93 convertible back in the day that done this too, never did figure out what was wrong with it.. . . finally, the torque boxes ripped out of it and destroyed the car at 120mph. Yea i know, that has nothing to do with the torque boxes, but it makes for a cool story...

Whatever it is, it has to be something that resets itseld EVERY time the key is turned off......