98 Octane

I have changed 3 sets of brand new coils Sparks injectors also have done swap and it's still the same the compression has been measured the values are pretty much the same for everyone cylinder the misfire it's always at cylinder 1 and there's no electrical issues with the harness on high RPM after 5k it is throwing the code misfire always 1 cylinder and there are no issues when i go back to stock but on mhd 2 and mhd 2+ maps it is throwing it every time when i push it