fuel puking out of charcoal canister

Has anyone had a problem with fuel leaking out of the charcoal canister after filling the gas tank full? Maybe should keep it down from the top a few inches.

Correct me if I'm wrong, but isn't the charcoal canister for fuel vapors?

correct,vapor in the fuel tank on a non vented fuel tank. On my 72 there is a hose that runs from the top of the tank to the canister, when the engine is running I believe vacume pulls the vapor through the can and into the intake. I think I'am overfilling the tank and causing gas to fill the canister and discharging out of the can overflow hose onto the floor.The canister is close to the headers and exhaust.

Well that makes sense, but I'm sorry I don't know if that is the probem. You didn't have the tank or anything major in the fuel system out did you?

No I haven't, its only happen twice that I know of.When I picked up the car when I bought it, the previous owner was nice to fill the tank.When he started it for the last time it puked about a quart on the garage floor, and on sunday when I filled it maybe a half gal.past the click stop. Drove it home, half hour later notice gas on the floor. owned this vette going on three yrs now.

I've seen this come up on the corvetteforum website, it's a common problem. That's probably why my car smells like gas after I fill up, expecially in hot weather when the cold gasoline expands in the tank. Joe

I got to thinking about this problem over the weekend and what may cause this is a stopped up fuel tank vent. As fuel sloshes around it creates pressure with the cap on. If the normal vent is stopped up then it has to release pressure somewhere and it would possibly backing the fuel and pressure through the vacuum line. Its kind of like siphoning a tank. The pressure exiting the tank through the line leading to the charcoal canister create a vacuum once all the air has exited and starts to pick up fuel like a siphon.

Maybe?

My gas cap is non vented,in reality the charcoal can is the vent,only happens when I fill the tank to close to the filler opening.Burn a couple gals. and no gas on the ground.

Hey guys,

I just stumbled upon this thread and thought I would ask a question. I have an '80 L-48 that wreaks of gas when it is hot outside. Do any of you know if the '80 model had this infamous charcoal tank that you are discussing? Sorry to hi-jack the thread but since you guys are discsussing this very tank, I thought you would know.

CVT4ME

|UPDATED|7/1/2003 10:00:52 AM|/UPDATED|

I'm not totally sure, but I think all 71 through 82 C3's had a charcol cansister (aka Vapor Canister. I'm going to take a gamble and say that its probably in the same place on your 80 model as my 72. Its located behind the Left side (drivers) front tire inside the open fender area. Look inside your fender gill and you may see it. You can access it from under car. There should be three or four bolts that can be removed that will drop a splash shield down and give you access to it.