Well, you have to fix the misfire first, the PCM doesn't like that. So it can and will limit power. Random misfire does not jive with the PO telling you it is an injector issue on
#2 . You will find that our PCM is pretty intelligent so if
#2 is missing that badly it would tell you.
Need to post more detail symptoms, like does it idle correctly,yes for the most part when it comes to misfire it wontcan you feel or hear the misfires,yes rarely but it happens is the RPM steady to the 5k limit you indicated?yes it is steady on all gears AFR readings,I do see here that it iusually stays at 14.7 with the predator tune fuel pressure, OEM coil and wiresyes oem, plug type and how old, plug gaps? Is there a tune in the car or stock? predator 93 tune
Post your known mods and accessories too.