Allright, just dropped in a 97 LS. I'm trying to wire the IACV.
I'm using the original 97 LS IACV 2Pin Plug and im trying to wire it to the ECU (also 97 LS)

Right now I have the Blk/Blu off the IACV going to A12
And I have the Yellow/Blk tapped into A11.

Is that correct or do I have it wrong? My idle doesn't sputter, but when I drive and come to a stop, it idles high, then sometimes it goes back to normal Idle.
thank for help..

 

Are you throwing the code at all? If you're not then IACV should be wired up correctly.

Try 'burping' the cooling by getting ALL air bubbles out of the water system.

Also try tighting the fast idle valve which is right under the throttle body, and lowering your idle screw on the TB.

HTH.