Misfire problems

[R32gtr858]

Hello I have a problem with cyl 4 misfire. I swapped coils and plugs already and still cyl 4 is the only one that misfires. Vehicle use to have a hks twin fire that I removed from previous owner. I followed the steps through the troubleshoot. I tested all the cylinders at the ecu and they all get about 0.06 to 0.08 volts except cylinder 4 which is at 1.22 volts at idle. Then I tested the voltage to coming from the ignitor to the coils. All cylinders texted at around the 12.40 to 12.60 range except cylinder 4 which tested at 13.10. Would these results indicate a bad ignitor or is it a possible wiring harness issue. Thanks