55chevy

iTrader: (6)

I'm adding a charcoal canister to my conversion. I'm tired of the fumes and smell of gasoline in my garage when I come back from a cruise. I just want to double check that this setup is correct before I get started.

Fuel Tank Vent-->Canister-->Canister Purge Valve-->Throttle Body (OR MANIFOLD?)

Are those all the components I need besides the wiring of the purge valve? It is my understanding that I do not need any other tank vent or a vented gas cap for expansion or contraction of the tank if I have the canister. Is that also correct?

Little more info:
I already have a 5/8" hose venting my fuel tank to the upper part of my filler neck for fueling the car. So, I plan on putting a T into the 5/8 line and run 1/4 or 5/16" fuel line up to the canister near the engine. When I'm not fueling the car, the vent on the filler neck is not open to the atmosphere.

Thanks

bczee

iTrader: (12)

Question, Do you still have the EVAP function in your your PCM program ?.. If your using the EVAP solenoid/valve, the PCM will need input from the fuel tank (at lease from the pressure sensor and maybe the fuel level ?).

For mine setup. I just used the cansister with vacuum without the EVAP valve.

55chevy

iTrader: (6)

More questions..

Where does the purge line enter the engine? I was thinking it was into the side of the throttle body on the drivers side but now I'm wondering if there is a manifold port.

Also, how will air get into the tank when the fuel is used up? Is there a canister with a third port that allows fresh air in without letting the fuel vapors out?

Thanks

oange ss

iTrader: (50)

port on the manifold behind the throttle body, drivers side

canisters do have a vent for fresh air inlet to "clean" the charcoal inside, it also serves as a vacuum release...if you put full vacuum on a sealed tank vent system you could "oil can" the tank or at least collapse the hoses

rsz288

EVAP here seems to work fine without either fuel level or tank pressure. Just hooked up with the regular EVAP solenoid and a canister.

And yes getting the EVAP setup on with a canister is terrific for getting the gas fumes in the garage under control.

55chevy

iTrader: (6)

Thanks everyone.

I'll get it installed as soon as I get my hands on a canister.

bczee

iTrader: (12)

FYI..

When i tested the vacuum source at both the back of the intake and the port on the TB.. The Vacuum was much stronger at the back port.. The TB port acted much more like a carb ported vacuum source. I used that port.