95' Camaro

I have a 95’ v-6 Camaro. It tends to run rough from time to time. It has been in the dealership numerous times. The dealership has replaced the IG modules and the coil packs. But nothing seems to work. When it runs rough, I cut it off and then restart it. It then runs fine. What suggestions could I give my dealership service about how to fix the problems with my car.

Are there specific operating conditions under which it runs rough?
Has the fuel filter been changed? Pump and pressure regulator been checked?
Any codes?

There’s no codes. I changed the filter once, it ran we about 5 mo. and the problem reoccured. As far as I know the pressure regulator has not been checked. Could the the pump and pressure regulator cause these types of problems?