so I had about a hr lastnight to tinker, I adjusted the iac scaling to a 90mm Holden car specs and opened up the bleeder screw a decent amount on TB and wow it made a difference... scaling more than anything

My iac steps are now 42 at 195 ECT

So this truck still hunts a little for idle with no load if I bump the throttle- if the efans are on (commands more air flow) or ac is on (commands more air) I can bump throttle and it goes right back to 800 rpms.

Would that be a spark or desired airflow issue at idle no load I need to tweek more? It idles around 14.2-14.4 afr right now