Cylinder 5 intermittent spark?

[1967ls2]

2005 GTO LS2 in a 1967 RS/SS Camaro.

So I noticed my vehicle was hesitating & I had a misfire. I scanned it and it said that there was a misfire at cylinder five and possibly a coil primary or secondary issue.

These are the things I have done to fix/diagnose.

Replaced both o2 sensors (haven't replaced and thought it was time anyways)
Replaced plug wires
Swapped coils
Swapped coil packs from both sides
Swapped plugs
Checked the continuity from cylinder five coil wire from the white plug that plugs into the coil harness with the correct pin that connects to the pcm.
I bought an inductive wire tester so I can check to make sure I'm getting spark when the vehicle is running.



It's like I drive it around, the car drives fine for a while then starts missing. This happened today, so I did the majority of the testing referenced above, plugged it all back in, cleared the codes, fired it up and checked and cylinder five was hitting again fine.

I'm almost positive that if I drive it around for a while (I'm going to test drive again tomorrow after work to confirm) the misfire at cylinder five will come back.

Any other suggestions as to what could be causing this intermittent issue?

[dirty rick]

Injector or wiring?

[1967ls2]

I believe it is definitely wiring. When I connect the inductive spark tester to the number five cylinder plug wire, the indicator light is intermittent.