Vacuum maybe?
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Senior User
Joined: Feb 2003
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From: South Carolina
Vacuum maybe?
71 F100, 390. Front of engine bay, passenger side, directly behind radiator - small round canister that seems to be some sort of vacuum related deal... what is it exactly and do I need it? Can't be doing any good right now because the hoses that go to it are rotted anyway. Should I fix the hoses and hook it up or just get rid of it?
Logistics Pro
Joined: Jun 2003
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If you get rid of that charcoal canister, plug the metal tube. It is a gas tank vent. You can then get a filler tube from a non-vented tank and use a vented gas cap. Mine plugged up on the previous owner so when I bought the truck I got a non-vented tank and filler tube from the boneyard and bought a vented cap.
Some trucks had evaporative control, some did not.
The previous owner was having fits trying to figure out why the truck kept acting like it was running out of gas with fuel in the tank
Some trucks had evaporative control, some did not.
The previous owner was having fits trying to figure out why the truck kept acting like it was running out of gas with fuel in the tank
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Last edited by Mil1ion; Apr 24, 2006 at 11:26 PM.
Cargo Master
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It's meant to have one of them accordion/paper hoses coming off the top and going up to the air cleaner housing. I bet your air cleaner housing has a plastic attachment on it for it that you've never known what it was for. That way the gas fumes get burnt and not just vented into the atmosphere.
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Senior User
Joined: Feb 2003
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From: South Carolina
Originally Posted by Mil1ion
Originally Posted by Ford_Six
It's an emissios canister. I'd leave it, it keeps the gas smell from the venting tank away from the cab.
Originally Posted by qman
It's meant to have one of them accordion/paper hoses coming off the top and going up to the air cleaner housing. I bet your air cleaner housing has a plastic attachment on it for it that you've never known what it was for. That way the gas fumes get burnt and not just vented into the atmosphere.
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Cargo Master
Joined: Sep 2004
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Probably. Just replace the hoses from the tank to the canister. That's what mine is like. I also don't have the paper hose and I don't smell gas.
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