Charcoal canister-2nd try....
 

I asked this question during the week and got no response...I am trying again as it is Sunday and maybe I will get a larger group of viewers:

I took the Charcoal canister off my 72 El Camino (350) to clean up the engine compartment. There are three hoses on it. I plugged off the vac tube at the Carb base where one of them went. I took the one that was "T"d on the hose between the vac line on the base of the Carb and the PCV valve on the valve cover off. I then took the vent hose from the gas tank and plugged it into the "T" at the PCV valve.......... I drove around for a day and had no problems. Then when I went to fill up my gas tank ( it had been close to empty on the day I had no problems) as soon as I left the gas station the engine started to flutter......then it died.....like I was out of gas! After looking for problem for a while I decided to put the charcoal canister back on just to make sure that was not the cause........well it was now it runs fine. I am assuming that the hose configuration I used caused a vacuum problem in the gas tank and the gas could not get to the fuel pump. So ..........what did I do wrong with the re-hook up of the hoses? And what is the correct way to do it.......jerry

T ing into the vapor line to the pcv was a big mistake.
The Vacuum the PCV pulls is excessive, the engine "thought" it had a vacuum leak, your lucky it didn`t run so lean it burned a piston or valve. I`ve been trying to do this same thing with my 86 Cutlass, if I plug off the vapor line, I have all kinds of fuel pressure problems, excessive high pressure is the result, but if I leave it open and park the car all you can smell is gas. When I did this I used a orifice with the smallest hole drilled in it possible, it still pulls so much vacuum and makes the fuel cap make a noise from the vacuum being pulled through it. so I would just recommend you run the vapor line to the air cleaner, so it`s not being pulled by a high vacuum source and won`t cause any problems elsewise.

Double Vision.......

When you say "vapor line" do you mean the vent hose coming from the gas tank that is now plugged into the canister?

exactly, in the days before this, the gas cap was vented, if you can find a vented cap to use, you can do away with the vapor line altogether or just leave it on and plug it off.

Thank you Mr. Vision.........I will try to find a cap and plug off the line.

I ditched the charcoal can in my '72 Nova about 30 years ago, & I stuck a cigarette filter in the vent line under the hood to keep critters out. It's still there & everything works fine.