I am not an engineer but does anyone know why the fuel pressure regulator on a car engine is

installed at or close to the fuel rail?


Wouldn't it be easier to pressurize the fuel rail like they pressurize any hydraulic system, with the pressure regulator installed right at the pump? That way we would not need a fuel return line?

I appreciate your comments. Thanks.


Ramon

It has to do with the return line system. Fuel is constantly recirculated
to keep it cool I think. Keeps the air bubbles out which would cause a miss.

Paul Lamar