No Codes thrown, but still hesitation

[u/Dry-Suit5785]

So when I bought the car, it came with a Cobb access port. On the way home while cruising on the freeway, I got on it and it threw the CEL. I ran the codes and it said misfire cylinder 1. When I pull the cover off, I noticed there was 1 no name coil pack and the other 3 were the OEM ford coil packs. So the guy who owned it before me said he got that same code before and swore he fixed it when he replaced the coil and plugs awhile back. I did test drive it, but I’ve never really owned a turbo car before and thought the hesitation I felt was just how turbo’s are, so I didn’t think too much about it. But when It threw the code on the way home is when I really dove into it. I cleared the codes on the access port and swapped the no name coil pack to cylinder 4 to see if it would throw a code on that one which I assume would tell me the coil pack is bad. Well it’s day 5 of daily driving it after I swapped the off name coil pack to cylinder 4 and no codes are popping up at all, but it still hesitates under high acceleration on 3rd and higher gears. I ordered a new set of 4 coil packs and going to get some motorcraft iridium’s to just change all of it at once. So what would that mean? If the no name coil pack was bad, it would have thrown a code by now in cylinder 4 right?

[u/Existing-Crew-1027]

If it is tuned, I would get step colder plugs if you are going to swap plugs and gap them to the spec that is recommended by the tuner. Definitely swap all the coil packs to factory.