From: Patrick C on 16 Aug 2008 17:34
Haven't has a chance to work on the problem lately but the light went out by
itself when we took a short trip (though it involved a piece of highway with
speeds above 65) and I filled the tank and noticed the vacuun seal being
broke by that shish sound when I removed the cap. The light stood off for a
few days of shorter trips then came back on. the tank was 25 to 33% empty
when it came back on and didn't hear the vacumn escape when I went to fill
it up again.
Yes, I too assume the clicking is a release so you can't tighten the cap too
much. But having changed the cap without sucess have eliminated that as the
From: Ray O on 17 Aug 2008 01:25
"BillyG" <curiousbill2006(a)aol.com> wrote in message
On Aug 12, 10:32 pm, "Jeff Strickland" <cr...(a)verizon.net> wrote:
> "BillyG" <curiousbill2...(a)aol.com> wrote in message
> On Aug 12, 9:16 am, "Patrick C" <m...(a)privacy.net> wrote:
> > Yes, I spent all of about $11 so far compared to the $80+ cost of the
> > valve
> > but I enjoy trying to repair things myself and call outs from autozone
> > for
> > the error code did mention gas cap, hose leaks, as well as the valve and
> > canister.
> My check engine light has not come back since clearing theP0441code
> 5 days ago. I'd read overfilling tank can lead to this code that is
> something I frequently do so will run my car towards empty before
> refueling as long as the light stays off. I realize most of the time
> problems are more complicated but hopefully mine will prove to be more
> The Evaporative Emissions Control System includes the gas tank, filler
> hoses, and the plumbing that directs unused fuel and gasoline fumes back
> the gas tank.
> ANY Evap System code should first be isolated away from the gas cap. Since
> you and your significant other spend in inordinate amount of time opening
> and closing the gas tank via the gas cap, AND the system is delicately
> balanced between a small pressure and a small vacuum AND the balance can
> easily disrupted by a leak caused by the gas cap, AND this disruption can
> show up pretty much anywhere in the system, I always suggest isolating the
> User Errors from the stuff that can acutally break. This system is not a
> safety of flight item, so you can easily afford to adopt a wait-and-see
> Surely, there are lots of parts in the system that can fail but these all
> cost money to fix (well, a vacuum line can break off but this is a rare
> event, and if the gas cap is sealed well then the broken vac line will
> up while you wait). The gas cap is free, if somebody failed to securely
> tighten it. I would not buy a new gas cap, but I'd wait a week or two to
> if the gas cap being securely tightened will fix the problem.
> After that, I'd do what Ray says.
The engine code hasn't reset since I cleared it over a week ago.
Because I have a habit of filling the tank until fuel splashes back
and haven't refueled since clearing the codes hopefully by not over
filling the problem will be resolved.
I've assumed that the gas cap is properly threaded if it reaches a
point where it clicks when turned. Is that a correct assumption?
Filling the tank until fuel splashes back is not a good practice. Fuel
spilled on the ground contaminates the soil and the vapors from the spilled
fuel pollutes the air; there is the increased risk of a fire; the fuel can
damage the car's paint; and over-filling the tank can contaminate the
evaporative emissions (charcoal) canister.
The gas cap is properly threaded and tightened if it clicks when turned.
The cap should be tightened until you hear it click several times, as
indicated on the gas cap itself.
(correct punctuation to reply)
From: Ray O on 17 Aug 2008 01:30
"Patrick C" <me(a)privacy.net> wrote in message
> Haven't has a chance to work on the problem lately but the light went out
> by itself when we took a short trip (though it involved a piece of highway
> with speeds above 65) and I filled the tank and noticed the vacuun seal
> being broke by that shish sound when I removed the cap. The light stood
> off for a few days of shorter trips then came back on. the tank was 25 to
> 33% empty when it came back on and didn't hear the vacumn escape when I
> went to fill it up again.
> Yes, I too assume the clicking is a release so you can't tighten the cap
> too much. But having changed the cap without sucess have eliminated that
> as the problem.
The gas cap should be tightened until you hear it clicking. The cap is
designed so that it is easy to tighten it properly while not tightening it
so much that it is difficult to remove.
The check engine light came back on because a loose or bad gas cap will not
set the trouble code that you listed before, so tightening or swapping the
gas cap had no effect.
(correct punctuation to reply)