Hard start, is this even the computer? (video inside)
The main thing that perplexes me is that it won't remain running after start unless I crack the throttle. I expect this with no IACV, but why does it run so rough for the first several seconds? Notice the engine go from rough to smooth at 0:44 in the video, that's not me changing anything on the throttle. Once it smooths I can let go of the throttle no problem.
I'm pretty sure that's your issue, you're more than likely too rich or lean in that spot after the car starts. You probably tuned the rest of the map in that row, but you never touched those cells in the 800-1200RPM columns cause you never hit them otherwise.