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


It is just like screwing the fuel  pressure regulator into the side of a
carburetor. The regulator provides  accurate pressure where it is
needed and
absent any additional inputs like  heat or flow dynamics. Same for the
fuel
pressure sender.
Lynn E. Hanover


 With the pressure regulator right on the fuel rail as someone said
the correct pressure is right at the injectors, plus any air bubbles in
the system is bled out and returned to the tank, have you noticed with a
fuel injected car when they run out of fuel they just stop, no
sputtering ect. so they run until the pump can no longer keep the
pressure. They miss and carry on when you fill with fuel and try a restart.
      John Burey