For this first scenario, let’s assume a dead head style regulator with no return ... This is why you will see externally mounted fuel pressure gauges on drag cars so the driver/tuner can monitor ...

a fuel-pressure regulator, fuel filter and fuel injectors. Fuel system components are built to last, so the fuel filter is the only part that’s likely to require replacement on a schedule.

The fuel tank pressure sensor is part of the fuel pump assembly and is mounted on top of the tank or inside the tank. It’s part of the evaporative emissions system (commonly referred to as ...