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73-87 Chevy _ GMC Trucks => Fuel Systems and Drivability => Topic started by: gpday06 on August 10, 2006, 03:11:00 pm

Title: fuel vapor canister
Post by: gpday06 on August 10, 2006, 03:11:00 pm

what exactly do the fuel vapor canisters do? i believe that they just take the vapor concentrate it into a fuel and send it to the carb to be burnt, but im not sure, and since i have a 79 with dual tanks i dont have to worry about emissions, so could i just bypass them some how?

Title: Re: fuel vapor canister
Post by: DnStClr on August 10, 2006, 07:28:00 pm

That's what it does, but the vapors don't concentrate into a liquid.  The vapors are drawn into the carb or intake manifold (if tbi) by vacuum so they can be introduced into the burn cycle. Removing the cannisters isn't necessary, even tho a lot of us do it.. It helps clean the air by not allowing the unburned fuel to release into the atmosphere.

Don St.Clair
Culleoka Tn

Title: Re: fuel vapor canister
Post by: 123 pugsy on August 11, 2006, 06:15:00 am

Also helps to vent the tank.

Title: Re: fuel vapor canister
Post by: gpday06 on August 11, 2006, 02:32:00 pm

thanks, thats what i needed to know