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Vented Gas Tank |
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Al Pannizzo 
AMC Apprentice 
Joined: Sep/24/2020 Location: NY Status: Offline Points: 74 |
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 Topic: Vented Gas TankPosted: Oct/01/2022 at 4:29pm |
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I have a 74 Javelin. I had to drop the tank for repairs. I noticed that top of tank has a vent line. The line is then attached to a rubber tube than a Metal line that goes up to left side of engine Bay. It is then capped off with a rubber cap. That can’t be correct. Does anyone know where it should go? If it is supposed to go to a canister I cannot find it. I would like to hook it all up correctly. Please be specific if you know as I am handy but a bit of a Novice.
Thanks in advance!!
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turbo
AMC Addicted 
Joined: Oct/26/2008 Location: chicago area Status: Offline Points: 2568 |
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Posted: Oct/01/2022 at 4:47pm |
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Got to be vacuum charcoal canister. Someone will chime in with more specific info.
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they call me Capt RETIRED!
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Heavy 488
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Joined: Apr/27/2019 Location: In the Status: Offline Points: 3557 |
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Posted: Oct/01/2022 at 5:09pm |
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Someone probably pitched the carbon canister and associated connections
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Al Pannizzo
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Joined: Sep/24/2020 Location: NY Status: Offline Points: 74 |
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Posted: Oct/01/2022 at 5:25pm |
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Ok. Does anybody sell one or have one? How exactly do I hook it up? Also Without it can it cause a Gas Smell or any damage?
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Al Pannizzo
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Joined: Sep/24/2020 Location: NY Status: Offline Points: 74 |
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Posted: Oct/03/2022 at 10:09am |
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I’ll bump this. Would like to know how to hook up Canister correctly. Any help would be appreciated!
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mstrcrftr
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Joined: Jul/12/2010 Location: houston Status: Offline Points: 2066 |
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Posted: Oct/03/2022 at 10:18am |
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first, does your car have all of its emissions controls? Or are they missing as well?
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Al Pannizzo
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Joined: Sep/24/2020 Location: NY Status: Offline Points: 74 |
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Posted: Oct/03/2022 at 10:44am |
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They were not on car when I got it.
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troutwilly
AMC Addicted
Joined: Sep/14/2007 Location: Carriere, MS Status: Offline Points: 994 |
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Posted: Oct/03/2022 at 10:28pm |
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If you're not going for concours correct, I wouldn't worry about it. You have no emissions equipment for it to connect to. Just make sure the hose is not compromised anywhere between where it connects to the tank and where its capped off.
Edited by troutwilly - Oct/03/2022 at 11:35pm |
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Bill O.
70 AMX |
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FSJunkie
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Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4742 |
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Posted: Oct/03/2022 at 10:56pm |
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GM cars of the 1970's used the same canisters that AMC cars used. They were made by Rochester Products.
The fuel tank vent line first goes to a small plastic cylinder mounted near the gas tank on the frame rail. This is a liquid fuel separator that allows only vapor but not liquid to pass. A line from the seperator then runs up to the charcoal canister under the hood. The canister has two hoses: the vapor inlet from the vapor separator, and a purge outlet that connects to a barb on the underside of the carburetor air cleaner snorkel. Air flowing through the air cleaner creates a draft on that barb, which sucks the fuel vapor out of the canister. Simple and effective.
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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dltowers
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Joined: Dec/12/2012 Location: Friendswood, TX Status: Offline Points: 5827 |
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Posted: Oct/05/2022 at 1:03am |
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Not Needed....
In fact, the day prior to us picking up Linda's '74 Javelin, the Dealer removed all the Emissions Equipment, including the Manifold Bypass Connection Tubes.... All the misc Emission items were in a cardboard box in the trunk when we picked up the car.... We kept everything, but was never needed to inspect the car in Texas....
Edited by dltowers - Oct/05/2022 at 1:07am |
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Original Owner, 1974 Javelin:
360ci,2v,727TC. Motorola Multiplex with 8-Track. G4 Plum exterior with 421Q Black Uganda Interior. Purchased on July 16, 1974 from Hooker AMC, Sherman, TX for $4500.20 |
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