2000 Chevy Tahoe not starting

When my tahoe starts it runs great but most days it will not run in the mornings. It will fire and go dead. I can try again it will fire right up again and go dead. In the afternoons it will crank and keep running and not skip a beat. I have changed my cap and rotor and fuel filter. I have it narrowed down to a fuel problem because I can spray starter fluid and it will run. I have good fuel pressure and fuel to the intake manifold. I have no idea what it could be from there. It has been doing this about 4 weeks now. It does not signal the computer with a problem.I have had that checked.