[urq] WUR findings - Warmup Pressure Regulator

[Ben Swann]

Cody,

I don't believe I said anything to the contrary.

The original post was with respect to the vacuum routing, not the fuel routing.  I am
fairly familiar with how the control pressure circuit workd too and rebuilt a WUR back
in the early 80's, although I did not take any specific training on them.  My point was
not to get into specific - I think some of the references do a decent job of this.

As I mentioned, I did not go into specifics - just that the two reference ports on the
regulator shared a common source on the original layout for the WX and one port works to
enrich while the other one enleans. 

I don't question your expertise on any of this (probably much more than mine) and
certainly hope it didn't sound that way.

Ben

-----Original Message-----
From: John Cody Forbes [mailto:cody at 5000tq.com] 
Sent: Thursday, March 26, 2009 6:37 PM
To: Ben Swann; 'Bares, Vittorio'; gmbchef at sbcglobal.net
Cc: quattro at audifans.com
Subject: Re: [urq] WUR findings - Warmup Pressure Regulator

Ben Swann wrote:
> I just sent a reply to Cody, so read that for a little more info.  It 
> is helpful to read the Bentley to gain some details on the various CIS 
> and CIS-E systems.  To really get the whole story, BOSCH Fuel 
> Injection by Probst is the required bedtime reading.

Actually Ben I only replied to you privately not to the list so all he had to go on was
your reply. I'm not trying to be forcefull on this one, but I have Bosch training,
worked for years at a Bosch repair facility and own Bosch technical documents on nearly
all forms of the system. I assure you that the Bosch regulator with two fuel hoses is
essentially the same on most cars including the CIS 911's that I work on daily and the
5000's that I'm rather familiar with and functions as explained by Andrew and myself.
Some models have vacuum referance ports and some don't, but all function by reducing
control pressure by bleeding it into the fuel return to the tank (sometimes by way of
the fuel distributor, but it still goes to the same place).

Reading that I can see that this message may be a victim of emotionless text, but you
know how easy going I am Ben, please don't take that in any harsh or forcefull way. I am
just absolutely with zero doubt about my knowledge of pre-DPR (differential pressure
regulator - WUR-less) CIS.

-Cody