1994 Chevy Beretta car wont start

Welcome to the forum. I need more info. When the problem occurs, if the vehicle cranks good but won't start, use a noid lite on the injector plug, have a helper crank it, see if the lite pulses. That's one way of knowing if the computer sees a rpm signal.

Also, there shows to be an oil pressure switch in the fuel pump circuit, parallel to the relay circuit, Once you crank it enough to bring up oil pressure, the switch closes and the pump will run, regardless of the relay. The switch has to be functional and needs voltage.

Use a gage and check fuel pressure.