I've been searching for an answer but haven't found exactly what I'm looking for.

Background: I've got a 91 13b in my 1st gen that's controlled by a Haltech F10. All of the air control valves are attached to the intake manifold. Right now, the ACV is constantly open. If I want to pass emissions, I connect the outlet of the ACV to the tube connecting to the cat. Otherwise, I manually close off the tube to the cat and run the outlet of the ACV back into the intake manifold.

What I want: I'd like to have the Haltech control the air control system to run similarly to the stock system so that I can just hook the ACV up to the cat tube and leave it alone. I'm hoping this will help with my stinky exhaust at idle and save me some CO poisoning without burning up my cat by constantly feeding it air from the ACV.

The question: From what I can gather from the FSM and what I've read here it looks like I just need the Haltech to control the split air valve. Is this right? How does the stock system work? I've read conflicting info. Should the outlet of the ACV (to the cat) be pressurized at idle to 3000 rpm and then close off? Is this done by just sending a voltage to the split air valve?

Or am I just screwed and assured to die slowly of the sweet sleep only carbon monoxide can provide? Thanks.