Re: Gas pouring out of charcoal canister?
In an attempt to resurrect an old thread, I also have an 86. I have just replaced my original 350 with a remanufactured vortec 350 with no provision for a mechanical fuel pump. My remedy for this was to get an intank fuel pump (and fuel tank) from an 87, and run a wiring harness with relay. I too only have the fuel vapor line running to the charcoal canister as I desmogged while doing the engine swap.
Can anyone think of another reason there can be fuel overflowing out of the charcoal canister other than the tank was overfilled. I know for a fact I only had 5 gallons of fuel in the tank.
Thanks for your input!
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1986 C20 fleet side std cab: 
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