Re: evaporative emmission canister 1999 superduty
The tank was about 3/4 full and it was about 85 degrees outside. This was
the first time I ran the AC on this truck. I'm fairly certain the fumes
were coming from the canister - it just vents into the engine compartment.
From what I can read by the shop manual, the purge valve system may be
optional, so maybe it was never installed in this truck. What is missing is
the canister vent solenoid and the evap emissions canister purge valve plus
all the electronics and hoses. I took out the canister and blew air through
it and now I'm letting it dry out in the sun. I will probably replace it,
but I wonder how long until a new one gets saturated? It seems weird that
it would just vent into the engine compartment. Maybe there is a cover on
the large (about one inch) opening which would normally have a purge valve
attached - I wonder if I should plug this up? I agree venting into the air
cleaner is risky, so I'll probably scratch this idea. Thanks for the
input - I'm open to any other ideas on this.
"Spdloader" <email@example.com> wrote in message
> I'm not going to say don't do it, but I wouldn't, there's no way to
> it, because the computer can't gauge it. You'll have another issue if you
> Is the smell worse when your tank is full? Hot weather can make lots of
> vapor. Could be the canister element is saturated. Could be it's not the
> culprit at all.
> "Doctor John" <firstname.lastname@example.org> wrote in message
> > Thanks - that's a good idea. I've been looking around the engine
> > compartment and the canister purge system appears to be non-existent ...
> > it
> > isn't just disconnected hoses. I'm thinking of drilling a 1/4 inch hole
> > in
> > the air filter casing and using vacuum line to vent the canister
> > into the air intake ....
> > John
> > "Spdloader" <email@example.com> wrote in message
> > news:96Zye.129811$XQ.firstname.lastname@example.org...
> >> Until you get it fixed, run the AC on Max. That should recirculate cab
> >> air
> >> only.
> >> Spdloader
> >> "Doctor John" <email@example.com> wrote in message
> >> news:aaa08$42cbcac3$943fa6f4$15785@STARBAND.NET...
> >> >I noticed a strong gas odor while driving my 1999 Superduty V-10,
> >> >I
> >> > recently acquired. I checked for fuel line leaks and then looked
> > the
> >> > charcoal evap. emm. canister. This canister has one hose going to it
> > from
> >> > the gas tank to collect vapor and then it just has an open vent on
> >> > front
> >> > end which vents into the engine compartment. I think this is the
> >> > source
> >> > of
> >> > my gas fumes. I've check out two different shop manuals and they
> > describe
> >> > a
> >> > purge valve system which removes vapor from this canister and routes
> > to
> >> > the engine for burning. My truck was built in Canada, and it either
> > never
> >> > had this purge system, or it has been removed. I can't find any
> >> > photos showing this setup. Does anyone have any info on this? I
> >> > another way to route the gas vapors other than into the engine
> >> > compartment -
> >> > I got quite a buzz driving in hot weather the other day with the AC
> >> > on -
> >> > the
> >> > AC picked up the fumes and dumped them into the cab!
> >> >
> >> > Thanks
> >> >
> >> > John
> >> >
> >> >