2003 5.7 Hemi, cranks but won't start.

Hello, I am new here. I have a 2003 Dodge Ram 2500 with a 2010 crate 5.7 hemi in it. Recently, I would go to start the truck, and it would just crank and not start, and the ETC light would come on. I'm able to cycle the key to off, then start it again when I give it gas. I try to clean the throttle body regularly, but it was clean today when I checked it. Sometimes it will start, and immediately the ETC light will come on, and the engine will miss very badly. If I plug a scanner into the truck when the light comes on, no codes are present. Any idea what may be causing this? Thanks for any help / suggestions!

Do you know your fuel pressure?

No, I do not. How can I test this?

On the passenger side of the engine, on the fuel rail is a fuel pressure test port.
There are fuel pressure test kits available at most chain type auto parts stores, (maybe you can rent one) and one at Harbor Freight for $20

The pressure regulator is set for 49.2psi.

Okay, thank you! I'll get back to you on this! Also, only the window switches on the driver side door work, and the other ones (passenger side and rear window switches) do but very sporadically. Any idea what may be causing that to happen?

I don't know, maybe the switch contacts are corroded or dirty.