I'm not saying the injectors are a problem.

I'm saying to get a visual on what the injectors are doing, so you can confirm they are spraying as you would expect.

You've confirmed ignition/sparks on at least cylinder 1 and at a time that should alloow starting.

You say all 4 plugs are brand new....so I assume you've also then confirmed spark on all 4 cylinders during cranking ? ( if plugs are wet/soaked, do not even try and use them, at least until you know the engine will start and run )

You say plenty of air is available.

It has good compression...


Fuel...air...sparks.....it should be making some attempt to start or fire.