Alright dudes. After like 3 plus months of heavy engine braking, surging and hesitation I finally figured it out. I had a chip for the ecu made until I can get a tune. I told the tuner I wanted the iacv and Iab disabled for a few reasons. The individual throttle bodies in the manifold on the f20b are electronically and vacuum controlled. The block box had the nipple broke off the end so those were useless.
The iacv I wanted disabled because I would have to swap manifolds to go from 3 wire to 2 wire for my obd1 ecu. I chose an obd1 ecu so I can get tunes and upgrades later. So having no check engine light it was always in the back of my head that it could be the iacv since I had this issue before and it was the problem on my h23a1.
Few things I tried they probably needed to be done anyways: seafoam, clean out egr port, egr block off, PCV hooked up until I can get a catch can and all vacuum lines were triple checked and capped with vacuum caps.
Today I kept looking at the iacv I pulled a few weeks ago from a junkyard integra. It’s been sitting on my dresser for a while. Decided to finally go try to hook it up since I had nothing to lose. Fired up the car after wiring it up and I felt the solenoid click and the hesitation was gone. So I’m short if anyone has low rpm hesitation but vtec engages it’s probably not your tps, it’s most likely your iacv. Long winded but I’m excited to drive a normal car again