ecu location?

[PeterBergin at aol.com]

Replace it, cheep and easy.
Pete, 91 Avant
 
 
In a message dated 1/22/2011 12:07:07 P.M. Central Standard Time,  
ekellock at gmail.com writes:

Is there  any way to service he heater valve?  It sounds like I simply have 
 a
bad one and should replace it regardless.

I'll dig in and find the  info about the climate control lines in one of
those manuals,  etc.

Thanks!

Ed

-----Original Message-----
From: Tony  Hoffman [mailto:auditony at gmail.com] 
Sent: Saturday, January 22, 2011 7:29  AM
To: Ed Kellock
Cc: 200q20v at audifans.com
Subject: Re: ecu  location?


It should hold vacuum into the heater valve. There is a  diaphram in it, and
if it's leaking that's what is bad. It should only hold  vacuum into the
system under certain conditions. When the valve gets  vacuum, it closes off
the coolant. However, when it's not getting vacuum,  the passageway is 
opened
at the controler (in front of the glove box) so  that the vacuum that was
holding the valve closed can be released.  Otherwise, even after the source
of vacuum is removed teh vacuum in there  would continue to hold the valve
closed.

However, I would check the  line that feeds the cc, fromt eh engine. Also, 
it
sounds like one of the  flap controlers or lines may be bad. There are
several in there, that go  from the controler to the flaps. If you want to
check them, pull that  controler down a bit to access the lines, and start
testing with the  mityvac. You should be able to find where each goes by
color in the manual,  but I'm not 100% sure about that. If it's not in the
200 manual, try the V8  manual.

HTH,
Tony


On Sat, Jan 22, 2011 at 12:58 AM, Ed  Kellock <ekellock at gmail.com> wrote:


Thanks Tony.

I  found it and did my troubleshooting.  My email posted hours late  because
it was held by the spam filter or whatever.  

I'm  investigating a hissing sound behind/under the dash toward the  
passenger
side that I varies in intensity with boost level.

I've  tested everything with the Mityvac and the only thing that doesn't 
hold
a  vacuum is the heater valve and whatever it connects to on the other  end.

I tested the ecu hose right from the T off the intake  manifold.
I tested from that same point to the fuel pressure  regulator.
Under the plenum there's the white and black vacuum lines for  the climate
control.

The white one appears to only control the  heater valve and it would not 
hold
a vacuum. Should it?

Should it  hold a vacuum going the other way, into the CC  system?

Thanks!

Ed

-----Original Message-----
From:  Tony Hoffman [mailto:auditony at gmail.com] 
Sent: Friday, January 21, 2011  9:29 PM
To: Ed Kellock
Cc: 200q20v at audifans.com
Subject: Re: ecu  location?


Right side inside the kick panel. right in front of the  door.

Tony


On Fri, Jan 21, 2011 at 4:20 PM, Ed Kellock  <ed.kellock at gmail.com> wrote:


Where is the ECU in the  200q20v?

Left side or right side passenger  footwell?

Ed



No virus found in this incoming  message.
Checked by AVG - www.avg.com <http://www.avg.com/>  
Version: 9.0.872 / Virus Database: 271.1.1/3393 - Release Date:  01/21/11
00:34:00



No virus found in this incoming  message.
Checked by AVG - www.avg.com
Version: 9.0.872 / Virus Database:  271.1.1/3396 - Release Date:  01/22/11
00:33:00


_______________________________________________
200q20v  mailing list      http://www.audifans.com/mailman/listinfo/200q20v