What could be the problem if it seems not to be getting gas and its not the pump or relay and it will not start?

If the vehicle is not getting gas despite the pump and relay being functional, the issue could be a clogged fuel filter, which restricts fuel flow to the engine. Additionally, there might be a problem with the fuel injectors, such as clogging or electrical issues preventing them from delivering fuel. Lastly, a malfunctioning fuel pressure regulator could be causing incorrect fuel pressure, hindering the engine's ability to start.