1993 Burb Fuel Problem

I have a 93 Suburban with a 5.7. Had problems starting on and off.Changed the injectors and checked the fuel pump and it is working as well as a new fuel relay.It will start in the morning but not after work.Today it was fine in the morning and a no go after work.No spray to the injectors.Was thinking it may be the computer as I unhooked the battery for a few minutes and after hooking it back up it started right up. Any thoughts?
Thanks
Wally

The module and pick up trigger the injectors, TBI I assume. Could be the pcm, but you need to check the dist. issue first. You do have 9-13 psi fp when this occurs, again I assume.