I would assume that the B Bank (Left) regulator on the return side is
necessary to maintain the specified pressure in the rail, and only
opens to return fuel to the tank when that pressure is exceeded. I
don’t understand the function of the A Bank (Right) FPR, unless it
somehow acts as a check valve to prevent loss of pressure from the rail
back to the tank after shutdown.
Does anyone know precisely what each FPR is designed to do?
George Balthrop, Clifton, VA USA
85 & 89 XJ-S Coupes; 89 XJ40 VDP-----Original Message-----
From: xjnut@tpg.com.au
To: xj-s@jag-lovers.org
Sent: Sat, 23 Dec 2006 10:42 PM
Subject: [xj-s] Fuel Pressure Regulator Removal Question
There seems to be quite a lot in the archives on
removing/deleting FPR’s. Problem is, some say you can remove
the supply reg, and others say the return.
So, which one is it? I would think the return reg is the one
to remove.
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