NEED HELP..fine when cold, missing when hot

[Buffhulk]

This has been going on for 2 weeks now. I went to fill up on e85 and on the drive there my 370z single turbo was fine. On the way home it started missing. I sent a log to my tuner because there isn’t a check engine light and he said something is happening on cylinder 1 either a bad injector or coil. So yesterday I change the coil and starts up fine and runs good (because it’s cold) then once I let it sit a bit and get warm it’s comes back. Does this sound like the symptom of a bad injector? I don’t have any check engine light at all so diagnosing this is becoming challenging and tbh I do not want to remove the intake manifold on a guess cause that takes for ever. Any help would be great, thanks in advance.