Charcoal canister - any purpose other than emissions?

[opethmike]

As the subject says, charcoal canister - any purpose other than emissions?

[DMCMW Dave]

As the subject says, charcoal canister - any purpose other than emissions?

Nope. But you can't just plug off all the hoses as it is the vent for the gas tank.

[Spittybug]

Neutralizes the fish piss in the pontoon?

:ohcrap:

Your gas tank has to vent to somewhere (or environment). In theory, it sticks in the carbon canister only to be sucked off to the manifold once throttle body vacuum is detected. I've never seen any data on the effectiveness, but with carbon that old, how much could it be absorbing?

[DMCMW Dave]

Neutralizes the fish piss in the pontoon?

:ohcrap:

Your gas tank has to vent to somewhere (or environment). In theory, it sticks in the carbon canister only to be sucked off to the manifold once throttle body vacuum is detected. I've never seen any data on the effectiveness, but with carbon that old, how much could it be absorbing?

It doesn't have to absorb much, just what vents from the tank until the engine is running. If you eliminate it and leave the vent line open, you'll smell gas in the rear pontoon which also sort-of vents into the interior as well as out the antenna hole and the hole in the pontoon behind the bumper.

[opethmike]

Okay, so its as I thought. Shouldn't be any problem removing it then, as long as I leave the metal vent tube from the gas tank unplugged/uncapped, right?

[DMCMW Dave]

Okay, so its as I thought. Shouldn't be any problem removing it then, as long as I leave the metal vent tube from the gas tank unplugged/uncapped, right?

I'd route it somewhere other than toward the exhaust manifolds....maybe toward the power antenna vent opening or that hole under the bumper. There's a very remote possibility that you could have wet fuel coming out of that hose with a very full tank under hard deceleration (look where the tank vent is attached to the tank. . . . .

Why remove it? It's not in the way of anything. Hiding a nitrous bottle in the pontoon? :shhh:

[opethmike]

I may possibly be planning some future forced induction that would possibly want to utilize that area.

[Nicholas R]

I removed mine because that's where I put my air cleaner. I have rubber hose that has a fuel tank vent valve on the end connected to the frame hard line. The rubber hose is routed out of the way to the under side of the pontoon.

[opethmike]

I removed mine because that's where I put my air cleaner. I have rubber hose that has a fuel tank vent valve on the end connected to the frame hard line. The rubber hose is routed out of the way to the under side of the pontoon.

Thanks!

[Ron]

Other than for emissions purposes, the vent hose provides a route for air to flow (in the other direction) to replace consumed fuel and prevent the tank from collapsing, so you might want to put something like a clamp-on crank case filter wherever you terminate the hose...

[David T]

Whatever you do you must allow the fuel tank to vent. If it over pressurizes you will get leaks and if it gets a vacuum you will have trouble pulling fuel out of it. The charcoal canister more often is working than not. It is a passive system that is VERY reliable. Besides people messing up the hoses the only other problem I ever saw was the vent tube coming out of the bottom gets plugged up with bug cr-p. There is plenty of room in there even with that canister, maybe all you have to do is move it. If you do eliminate the canister I would run the hose for the tank vent down and out the hole in the bottom of the pontoon so fumes do not accumulate in the pontoon.
David Teitelbaum




Other than for emissions purposes, the vent hose provides a route for air to flow (in the other direction) to replace consumed fuel and prevent the tank from collapsing, so you might want to put something like a clamp-on crank case filter wherever you terminate the hose...

[dustybarn]

I may possibly be planning some future forced induction that would possibly want to utilize that area.

1776 has just such a system, with an intercooler and its dedicated fan both tucked within the left pontoon. It's in the Rochester area now, if you ever want to take a look at it.

[opethmike]

Holy shit! Finally another Rochester owner! Would love to get together sometime. How is your week looking?

[Iznodmad]

Holy shit! Finally another Rochester owner! Would love to get together sometime. How is your week looking?

His car is EFI as well. Don't know the current owner, but the previous owner was here in NC.