I have a 2008 2.4. Recently it has been cranking but not starting. It only does it when the motor is hot. It has to be fuel related because it with starts with starting fluid. When it's running it runs fine. I tested the fuel pressure when it's running, with only the key on and when it's not starting. The pressure is the same. 58 to 60 Psi
Any thoughts?

 

First, take it easy with the starting fluid, it's all to easy to cause catastrophic damage with it especially on highly strung aluminum intensive engines like the Ecotec fours.

Take it to your local auto parts store and have them pull the codes, even if you don't have a CEL displayed, it might have stored OBD II trouble codes.

At first blush it sounds like a case of "Vapor Lock", but there needs to be more diagnostic work done.

P.S. to the forum!

 

Welcome to the site! Post your code when you have it, we'll walk you through this.

 

A wild guess is a vacuum leak.

 

One other thing to try is turn the air conditioner off when starting hot. Mine cranks for a long time with the AC on.