How to tell if fuel pumps are running by current draw?

You could install a Hobbs switch to a small led light, but not cheap $80 bucks my last one. Imo probably liquid fuel in till over engine, then liquid into vapor because of engine heat. So your pump might be working good, but fuel vaporizes before getting to where the fuel needs to be liquid at ie injected into cylindar.
Just you or is this common problem with your make and model.