Your fuel system is comprised of the following elements at a minimum. They could include fuel pump, fuel tank, fuel filter, injectors, carburetor, fuel lines and fuel gauge.

Fuel Pressure Regulators – Function, Failure Symptoms And Testing
All fuel-injected engines have, fuel pressure regulators, to maintain a regulated high-pressure level. Above all, fuel pressure regulators, must keep the pressure constant; in order for all of the components of the fuel injection system […]