so recently i did a 1st - 3rd pull on my sr20 like ive been doing for the past few weeks but this time ive ran into an issue, once i hit 3rd gear it started hesitating bad it felt like going through the windscreen, i was driving it home and it was sputtering real bad through 4th gear and eventually i had no throttle response at all. it came back after a few seconds and eventually cleared up pretty good but now when i hit around 4000 rpm it happens. ive checked all couplers and they are all still there, all vacuum lines, and put in brand new spark plugs gapped to .028 and im still having issues, i did notice if i keep it floored it will only happen about one or two more times in that gear so its not extremely bad. any clues what it could be? ive never had these issues before yesterday. here is a video of my problem.
https://youtu.be/DtPiYVnMDck?t=58
and a pic of my plugs before changing them
https://imgur.com/gallery/VtSm3dv any help would be appreciated even if its just letting me know to check over stuff. btw fpr is working good at 43psi no vacuum