wishybone2

Hey Guys I have a 1997 K1500 Silverado factory 5.7 and manual transmission. I have an issue I cant figure out. It idles high when moving. In gear or not... but as soon as you stop its come right down to 900. So the speed senor is obviously telling it to stop. I have changed the IAC and MAF with no luck... it will stay around 2000 to 2500 with no throttle. TP apears to be ok and no check engine lights. Hooked a computer to it and couldnt see anything out of the ordinary. Any ideas? Thanks!