[roadhard]

67 400 with the return fuel line and gas tank vent out of the tank, i get gas smell in my garge has anyone from a carbon filter for the vent, all mine lines are good , no leaks just gas smell all the time thanks for any help

[Goatracer1]

Are you asking about the vent line from the gas gauge sender? That should be connected to the return line running back to the tank from the fuel filter. If that is not what you are asking about check your gas cap and see if it is vented or not. Maybe you have the wrong cap.

[Old Goat 67]

67 Tempest & GTO did not have a vented gas cap.

[roadhard]

the little line from the neck of the tank. can that be plumb in a carbon filter, has anyone done this

[Jeff Hamlin]

I once had a clogged vent tube and was getting a slight fuel odor before I cleared it with a small piece of wire.

[hgiv]

My 69 Firebird used to stink like gas all the time. When sitting. When driving. It ran pretty good but had something wrong. I was getting ready to pull the tank. I finally figured out that gas was seeping out from the inlet. I saw a wet spot. Not even really dripping that I could see but enough to make it smell. It would build up when sitting. But if it sat long enough smell would go away. Probably when it ran out of pressure in the line. I opened it up and replaced in in carb fuel filter (2bbl rochester) and then had a heck of time getting it to seat without dripping but we got there. It took several tries and more pressure than I thought to dare put on it. Yikes!

Boom. No more gas smell. Now I'm not saying yours is leaking but the point is that you need to look in unsuspecting places.

[roadhard]

this is were i what to hook up a carbon filter, does anyone think this would help with the smell , with out hurting the venting of the tank

[242177P]

You keep circling back to using a Charcoal Canister. If we tell you what you want
to hear, and your car (and garage) catch fire, would that smell better or worse?

[Jonsie]

With our 55+ year old cars with vented fuel tanks, there always seems to be a faint whiff of evaporating fumes when entering a closed location, camel-piss gasoline doesn't help matters

[Kenth]

Also, all carburetors are vented to atmosphere at all times and a hot engine will evaporate fumes faster at shut off.
Can´t see how a charcoal canister would solve this?
And i try to park my GTO´s in the garage with less than full tank as i noticed it helps reduce fuel vapors from tank.
Leaving the garage doors open a while before work in the garage is mandatory with these cars inside a small garage.

[roadhard]

i DID NOT KNOW THAT PUTTING A FILTER ON MY CAR WOULD CATCH ON FIRE, THATS FUNNY

[242177P]

A pressurized tank can easily lead to a fire.

Fires are funny... said no one ever.

[GT182]

A few years ago I had to put a new vent tube for the gas tank on my 66 GTO. I never get any gas smell with it sitting in my garage. It's been in there since last October, never moved but started only once since then.... 2 weeks ago. Still no smell of gas. Just fumes from a fart or two.... from me. LOL

[Mister Pontiac]

Not quite sure I understand from your original question, but is the standpipe for the vent installed on your car, or is the nipple from the tank fill tube open directly to the air?

Without the standpipe thru the trunk floor and back down again, that will probably cause a lot of fumes. It acts somewhat like a sink trap below our sinks in our houses. Keeps the smell down quite a bit, while allowing the tank to properly vent.

Hope that helps.

[roadhard]

I do. Have the stand pipe vent thru the trunk floor and have clean lt , never thought of it like a trap, makes sense ,I rebuild my carb and see that this is were the smell is coming from. Thanks. All for the help

[gomowgto]

Mine had the same problem, I could smell gas but had no visible leak. Turns out I had a pin hole in the filler neck and it only happened when I put too much gas in the tank, but that's how I finally found it. If you're vent tube is connected to the looped vent pipe in the trunk and you're smelling gas, you have a leak somewhere. I would drop the tank and have it checked. I fixed mine and haven't smelled gas for 15 years and mine is in the garage and closed for the winter and zero gas smell.