popeye73

On my 73 the vapor canister there are three hoses one to the gas tank, One small one to the passinger side of the carb right under the choke and the other one is not connected, where does it go? I'm thinking it goes to the pcv valve

redwingvette

It was connected to the PVC valve on the valve cover.

popeye73

Thanks, thats what I thought, but what would be the purpose of taking it off and plugging it?

in2fun

My canister is missing on mine. Who ever owned the car before I did took it off. My car dose have a new fuel cell... but no hoses running to the canister. The car runs great so I really just don't get it about the canister ( if I need one or not ). I have a 72. I know this is no help to you but I just want to see what people say about yours.

popeye73

Does anyone know what benifits or problems if any will come from plugging this hose off?

T's

redwingvette

The canister is just for emissions so it won't effect how the car runs. What it does is absorb fumes from the top of the gas tank and allows air to go back to the tank as the fuel is used. If the lines are pluged off, you would need to replace the gas cap with a vented cap.

Vapors from the tank are absorbed in the carbon when the car is parked. When the motor is running, the vacuum draws the fumes into the motor which cleans the carbon so it will be able to absorb the vapors again.

Is you over fill the tank it is possible to get raw fuel into the canister. There is a plastic valve on the side of the tank that is suppose to stop that from happening but does not always work. That is why you are not suppose to top-off the tank on any car. If you can smell gas after your car has been sitting in the garage for a while, the carbon canister may be part of the problem.

7T1vette

If working properly, I can't think of a good reason to remove the cannister/tubing. It's only there to reduce emissions by burning raw fuel vapors and to burn oil vapors that would normally dirty up the engine bay [and the air].