Hi Paul,
I started working on my fuel system today and came up with a few questions:

I'm using the stock 20B fuel rails and injectors.  I ordered O-rings

for the injectors and mounted everything after cleaning thoroughly.  I've
attached several pics so you can see what I'm talking about.

My first question is about the fuel pathway.  It appears that the fuel

should first enter the primary fuel rail at the end which has what
appears to be the pulsation damper.  It seems that the fuel will travel
across the primary fuel rail feeding the primary injectors and exit on
the opposite end of that fuel rail.  I've connected a fuel line from the
exit of the primary fuel rail to the secondary fuel rail.  The fuel
leaves the primary fuel rail and enters the secondary fuel rail at the
end opposite of what appears to be the fuel pressure regulator.  I'm
assuming that from the fuel pressure regulator, the fuel will return to
the sump tank.  Does this sound like the proper fuel path or have I left
something out?

Just like the 13Brew. Sounds right.

Second Question:  On the "exit end" of the primary fuel rail there is a

"sensor" of some kind.  Do you have any idea what this is?  You can see
this sensor in the attached .jpg file called "fuel_rail002".

There is a pressure regulator on the exit end of the 13Brew secondary rail.
The housing on the exit of the primary is just for the fuel line (on the
13brew). It could be the fuel temp thermosensor, which in the 13Brew is
mounted on the secondary rail.

Third Question:  The stock fuel pressure regulator has a fitting for

attaching a vacuum hose.  What is this for???  Can a vacuum hose be
attached there and then the other end of the hose just plug directly onto
any of the vacuum fittings on the intake manifold?  The Haynes Manual
mentions that there is a vacuum controlled fuel pressure regulator
control solenoid valve.  There is a picture on page 121 of the Haynes
Manual.  Is this part required to make my regulator work properly?????

This is a fuel pressure regulator that adjusts for manifold pressure. More
boost pressure in the manifold, more fuel pressure-so you don't lean out,
cause detonation or damage.

Thanks in advance!!
Sincerley,
Don Mitchell

Don,
This is from memory. No pictures came through on the list. I am away from
my 20B engine and books. Send me your email and I will look into it more
for you.
Cardmarc@midsouth.rr.com

Marc Wiese

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