[s-cars] fuel vapor on warm days

[Mark Strangways]

Think about this Gabriel, the vacuum in the motor draws the vapor into the
intake stream during light loads, and when the ECU says so.
If the valve is open, stuck, then when there is no vacuum, from a rotating
motor, then the vapors would happily discharge into the atmosphere.
At least that is what MAY be happening as I see it... the usual
disclaimers,,, 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 12:13 AM
Subject: RE: [s-cars] fuel vapor on warm days


The hose at the bottom does not dump vapors.  The vapors go in to the
intake vie the CCFV.

-----Original Message-----
From: Mark Strangways [mailto:strangconst at rogers.com]
Sent: April 4, 2004 8:23 PM
To: Wayne Dohnal; S-car list; marcweiner at comcast.net
Subject: Re: [s-cars] fuel vapor on warm days


There is a valve and a hose attached to the bottom of the charcoal
canister, which is ofcourse in the right front fender. The hose I
believe discharges before the wheel, but I am not going out to my car to
confirm that.

There is a chance that the valve is failed or failing and dumping the
contents of the canister at the wrong times. Or it is operating
normally, but I have never smelled gas around any S car that I have
seen.

Mark S
----- Original Message ----- 
From: "Wayne Dohnal" <wd1 at hevanet.com>
To: "S-car list" <s-car-list at audifans.com>; <marcweiner at comcast.net>
Sent: Sunday, April 04, 2004 11:14 PM
Subject: [s-cars] fuel vapor on warm days


> >There is a tube that runs under the passenger side of the car that
> >vents
> fuel vapor on warm days .......
>
> Thanks for the tip.  I need to find this tube and see if that's where
> my fuel smell is coming from.  I've had the S-car for 2-1/2 years, and

> I
often
> smell gas when I park, usually on a hot day.  I also pick it up
> sometimes
in
> the cabin when stopped in traffic on a hot day.  (I've rehearsed a
fast
> evacuation plan in my mind a number of times).   I can't count how
many
> times I've stuck my nose under the hood or under the car in the garage

> and in parking lots trying to find a leak.  The only thing I'm
> confident of is that the smell isn't originating under the hood.  I
> usually get the
biggest
> noseful from the right rear wheel well.  With all the searching, I
> have never been able to find the slightest trace of liquid gas
> anywhere near
the
> fuel lines or the mountings.
>
> Wayne Dohnal
> 1994 S4
>
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