Iac Counts Too High!!

[SNAKE250R]

I've Finally Got My 86'gn Running Under Boost With Help From This Forum,thanks Guy's!! (needed A Coil In The End) But Now I Need To Fine Tune.i Noticed My Iac Was High (70's)on Scanmaster So I CLEANED THE VALVE WITH ITS BORE AND Tried To Adjust Down By Turning Clockwise On Throttle Stop Screw,i Managed To Get Down To 50 ,any More Ajustment Raised Idle And Counts.i Did Turn Screw 1/4 Turn At A Time,waiting Between Adjustments And Car Is Warmed Up.i Also Know That Tps Needs To Be Re-adjusted,but Do I Need To Re-adjust Tps With Every Iac Adjustment Or After?the Tps Went Up To .44 From .42 When I Tried To Lower Iac,is That Why I Cant Adjust Down.car Seems To Idle Ok With 800 Rpm On Scanmaster,is Iac That Important To Tuning?i Wanted To Start With The Iac And Tps Before Adjusting Boost,fuel Pressure And Translator Or Is There No Order To Tuning These Animals! Thanks Again!