[2001sleeper]

If the cylinders are not firing, you would not have similar temps at the header compared to the others. Didn’t you say you have compression, spark, fuel, AND exhausts temp?

 

[2001sleeper]

The injector is only telling you if they are electronically grounding. Not necessarily spray pattern if there is a clog. If it is fuel injector you can move them and the problem will follow.

That is how I found my issue 2 years ago. I had an injector that was not spraying properly.