Re: you're the next contestant on "Name that Hose!!!"

["therealdmcvegas" <DMCVegas@xxxx>]

If these are the hoses I'm thinking of, they are for the vapor 
recovery system on the gas tank. It's supposed to burn up 
excess vapors from the gas tank, rather than let them escape. 
Confused? Let's explain!

Behind the access panel is the Carbon Canistor. All 3 hoses 
connect to this canistor.

Hose #1:
Connects to the fuel filler neck on the gas tank. Gasoline vapors 
in the gas tank will travel back to the canistor, and will be 
collected inside where the charcoal within the canistor stores 
them.

Hose #2:
This hose connects to the intake manifold on the motor. Once 
the engine is activated, the vacuum created inside the manifold 
will travel up the hose. This in turn activates a diaphram that 
opens up hose 3.

Hose #3: This hose is connected to the same vapor hose that 
the 7th injector is on (or as it's normally called, the Cold Start 
Valve). Once opened by the vacuum diaphram, all gasoline 
vapors within the carbon canistor are then sucked out, and into 
the engine to be burned up, rather than evaporate.

Hose #4:
Ah-ha! The forgotten hose! This is a drain tube on the bottom of 
the canistor! You can easily see this hose sticking out, on the 
bottom of the rear pontoon. Now, the mystery here to me was 
always this: What is it supposed to drain? I assume water, but 
gas vapors are heavy too. So how would it be able to stop one, 
but not the other? Then again, it's purpose is just speculation on 
my side at this point...

The purpose of the diaphram on the canistor is to disallow any 
gasloine vapors from entering the manifold while the motor is 
off. It could be possible that they could run backwards thru the air 
intake, and hit the exposed atmosphere. This is pretty 
dangerous since they are extremly flamable! Just take a look:

http://www.lasvegassun.com/sunbin/stories/lv-other_cut/2002/
apr/03/c00031135.html

Plus of course this is also bad for the environment as well. 
When gasoline, or any other petrol based products evaporate, 
they don't just disappear. They will condense just like dew when 
it gets cold enough. Now you know why gas pumps in smog 
areas have vapor recovery nozzles installed.

All cars now adays have this same vapor recovery system 
installed. You can't really see the canistor because typically it's 
hidden behind/below/to the side of the left front head lamp, 
behind the fender. But you'll find it on the Vacuum Hose Routing 
Diagram on the underside of the bonnet. Or depending upon 
where you're at, the hood. "Bonnet" just sounds so much more 
sophisticated though =)

-Robert
vin 6585 "X"



--- In dmcnews@xxxx, "James LaLonde" <krfds@xxxx> wrote:
> there are three hoses coming from the driver side of the 
engine bay, they
> are grouped together and come out of the side of the bay's wall
<SNIP>
> any help??
> 
> Wink.... tell em what they'll win.
> 
> "Well, Bob, they will win a life-time supply of 001697's owner 
James
> LaLonde's undying gratitude"
> 
> --james 001697