mourad

What's a fuel regulator? Is there more to fuel delivery than just tank->pump->filter->rail->injector->manifold ?

I thought regulators are used in compressed liquid gases like N2O and Propane to atomize them before blending. I didn't know there was such a thing as a gasoline fuel regulator.

Gallagher

I have a fpr, injectors, fuel pump.....


Reason for needing a new fuel rail is because while installing the fpr, the bolt decided to break on me inside the stock fuel rail, so I said time to upgrade (Y)

imported_BoOsTd

^^ thats a good enough reason

imported_mrchaos

indeed fuel return is in there too and the fpr regulates the pressure in the rail, returning fuel to keep pressure @ 43 psi (i think thats the right number)

so we have...

tank->pump->filter->rail->injector->manifold
................................->fpr->return line->tank

mourad

wait a minute... the regulator and return lines come AFTER the intake manifold? Where is that located in a 5th gen, just trying to get a visual.

But yeah, it makes sense now, forgot about the return lines. Thanks.

bbarbulo

iTrader: (2)

the fuel press reg on a 5th gen is on the driver's side of the rail, it's a little tophat lookin thing

imported_mrchaos

well i guess my line art is pretty crappy....its sort of like a y joint at the fuel rail....to fpr and injectors

mourad

lol my bad, I get it now. I think this is what you meant to draw:

.................................rail->injector->manifold
.............................../
tank->pump->filter
...............................\
.................................fpr->return line->tank

Is that right or does the Y split come after the FPR with a line going to the rail and the other back to the tank?

imported_mrchaos

................................/->injector->manifold
tank->pump->filter->rail
................................\->fpr->return line->tank

mourad

you sure that's the layout? I don't see an outbound line from the fuel rail - only an inbound. Maybe I'm missing it

imported_mrchaos

outbound would be on the fpr

mourad

....................................rail->injector->manifold
.................................../
tank->pump->filter->fpr
...................................\
.....................................return line->tank

imported_mrchaos

well you have yours splitting at the filter, there is only a single line come from the filter.

i will take a pic of my engine bay later today and show it all

mourad

Yeah I corrected the diagram. My bad.
Thanx dude

imported_mrchaos

fpr is at outbound end of rail...it regulates the rail pressure by dumping any fuel in excess of pressure back into tank

mourad

if fpr is outbound from rail, it means that there is an outbound line from the rail but you said:

bbarbulo

iTrader: (2)

The FPR is mounted to the rail on the driver side of the rail, it's about an inch tall, inch diameter with a vacuum line at the top of it. The fuel-in line comes from the pass side of the car into the pass side of the rail. Hose says "fuel" on it

imported_mrchaos

[/QUOTE]

okay well yes....no outbound line DIRECTLY on rail. But the fpr is on rail and outbound line on fpr.

fpr has vacuum on top and return on bottom

mourad

got it.

imported_mrchaos