P2311 Fault Code on 2010 Challenger RT Classic: Cylinder 4 Misfire and Coil Wire Issues

I'm experiencing a recurring issue with my 2010 Challenger RT Classic, specifically the P2311 diagnostic code indicating insufficient ionization on cylinder #4. After replacing both spark coils and ignition wires, resetting the battery, and clearing all codes, the engine runs smoothly in park and neutral—no misfires detected. However, when I shift into drive, after just a few yards, the check engine light reactivates, and the engine begins to run roughly with a clear misfire. The #4 coil pack has melted and split again, confirming a persistent problem. I then swapped the ignition wires between cylinders #4 and #6—afterward, cylinder #6's coil also melted. This strongly indicates that the issue is not with the spark plugs or coils themselves but rather with the ignition wire routing or connection to cylinder #4. I am currently scheduled to visit a second dealership on April 2nd. The first dealer claimed I needed a discontinued wiring harness and a PCM, which they then recommended I purchase without further diagnostics. They did not test the coil driver circuit for cylinder #4 or inspect the ignition wire integrity. Given that the issue persists despite multiple fixes, I suspect either a short in the wiring harness or a faulty coil driver within the Powertrain Control Module (PCM). I am now seeking advice on how to properly diagnose and resolve this P2311 fault—especially since the original wiring harness is no longer available. Any guidance on testing the coil wire circuit, using a test light, or identifying potential short circuits would be greatly appreciated.