chasing codes for too long

Test your intake gasket.

did a slow 360 starting fluid spray, rpm same, thank you

Voltage going to coils? Fuel pressure test? Vacuum leak? Seal the new injectors good?

Did you put original equipment oxygen sensors in? I have seen many makes that are sensitive to aftermarket sensors. Many don’t even see it and light stays on.

Smoke test?

You said new coil pack. Singular... have you tried labeling them with a paint marker for original spot and then moving them to See if the misfire moves to a new cylinder?

thank you, you think like i do, the 02 sensor is questionable, since its a code after replace, im not suspecting fuel side, im aware that a smoke test would show if a crack is present, but not getting those codes since the new fuel filter. the coil pack is all 6 in a box, there are a few things, wire related that could be an issue, the new harness from ecm is 400, i replaced the ecm and the sum check went away, i feel im near done throwing parts at codes, and thank you for helping my old ass remember things, much appreciated

A vacuum leak can result in a misfire. Smoke test if you can’t figure it out.

Taking it to a mechanic probably would have cost less than throwing parts at it. Just sayin...