[s-cars] fuel vapor on warm days

[Mark Strangways]

I actually decided to go look for myself, it wasn't that cold I guess.
There really isn't much to be seen without removing the bloody fender it
seems.
If my assumption, that the valve is some form of check valve is correct,
replacing it will surely be a bitch.
But these are Audi's,and we all knew that they where hard to fix walking
into it anyways.

Mark
----- Original Message ----- 
From: "Gabriel Caldwell" <gabriel at ts.bc.ca>
To: "Mark Strangways" <strangconst at rogers.com>; "S-CAR at audifans.com"
<S-CAR-List at audifans.com>
Sent: Monday, April 05, 2004 6:55 PM
Subject: RE: [s-cars] fuel vapor on warm days


That's what I get for not looking at my car and assuming it was the same
as most systems I have seen.  D'oh.  I'll never be sure of myself again.
Can I curl up and die now?

Gabriel Caldwell

-----Original Message-----
From: Mark Strangways [mailto:strangconst at rogers.com]
Sent: April 5, 2004 3:27 PM
To: S-CAR at audifans.com
Subject: RE: [s-cars] fuel vapor on warm days

Gabriel, I will attach the Bently drawing which clearly shows a valve on
the
bottom of it.
Look at item 12, by definition it is a valve... below
      9 -  Hose
         To throttle housing
      10 -  Hose
         Hook into clip on activated charcoal filter
      11 -  Sealing ring
         Always replace
      12 -  Ventilation valve
         Regulates ventilation of EVAP canister
         Prevents splash water from reaching EVAP canister

I will agrue this point with you as I am not going out to my car to
look.
Too F*** cold, I offer this only as suggestion and what I have read in
bently.
To say it's wrong, and dismiss it like that is a bit heavy handed, but
suit
yourself.
Agian all the usual disclaimers apply, YMMV...

Mark S
----- Original Message ----- 
From: "Gabriel Caldwell" <gabriel at ts.bc.ca>
To: "Mark Strangways" <strangconst at rogers.com>; "Wayne Dohnal"
<wd1 at hevanet.com>; "S-car list" <s-car-list at audifans.com>;
<marcweiner at comcast.net>
Sent: Monday, April 05, 2004 2:42 PM
Subject: RE: [s-cars] fuel vapor on warm days


That is incorrect.  Take a look at your carbon canister.  There are TWO
hoses attached to it.  The hose you are referring to, the one that is
open to the atmosphere NEVER emits fuel vapours and it does not have a
valve on it.  The carbon in the canister stores the fuel vapours until
the Carbon Canister Frequency Valve (attached to the OTHER hose) opens
and the engine vacuum draws the vapours in to be burned.  The carbon
canister frequency valve being stuck open would not result in fuel being
released in to the atmosphere however it may cause other problems.  The
carbon canister being damaged in some way could result in a fuel smell.
I would examine the gas cap seal as the most likely culprit.

Gabriel Caldwell


_______________________________________________
S-CAR-List mailing list
S-CAR-List at audifans.com
http://www.audifans.com/mailman/listinfo/s-car-list