hi,

im switching to carb this winter and want to get rid of the charcoal canister. so what do i do with the hard metal line that goes back to the fuel tank? do i plug it completely or is it better to put a filter or something on it? or nothing?

thanks,
nebu

 

You need to put a filter on it. The tank needs to vent or it could collapse.

 

uh oh.

I took mine off a long time ago and i pluged the metal line with a screw.

I knew it was a vent to the fuel tank, but i didnt think plugging it would make it collapse!
My thinking behind plugging it, is that if its left open the gas in the tank will evaporate.

but anyway ive been thinking of buying a new charcoal canister and putting it in. It's not like taking it off has given me any more power and it doesnt weigh very much anyway...

 

ok thx. i think i put a filter on it then

main reason for removing it, is that the carb (700 holley dp) has only 2 connections. one for the distributor and one for the brakebooster.

and i want a clean look on the engine bay

 

If you engine isn't computer controlled remove the canister because you'll have no way of purging it. The vapor in the gas tank will be lost to atmosphere when you refuel.

June 29, 1988 vin JL145359 and up had the in-tank pressure relief valve eliminated from the sending unit and a valve added to the canister side of the vapor line.

From 1988 AllData Camaro 5.0/5.7L TPI/TBI
EVAPORATIVE CONTROL
The ECM operates a normally closed solenoid which controls vacuum to the purge valve in the charcoal canister. Under cold engine or idle conditions, the solenoid is turned "OFF" by the ECM, which closes the solenoid and blocks vacuum to the canister purge valve. The ECM turns "ON" the solenoid valve and allows purge when:

Engine is warm.
After the engine has been running a specified time.
Above a specified road speed.
Above a specified throttle opening.

IN-TANK PRESSURE CONTROL VALVE
The in-tank pressure control valve, a combination roll-over, integral pressure and vacuum relief valve, is located with the fuel sending unit in the fuel tank. When vapor pressure in the tank exceeds 1" Hg (5kPa) the valve opens and allows vapors to vent to the canister and then to be purged. When the tank pressure drops below the opening point of the valve it will close, keeping vapors in the fuel tank. The valve provides vacuum relief to protect against vacuum build up in the fuel tank and roll over protection to prevent liquid fuel from entering the canister during normal driving maneuvers.

 

i put a 95 LT1 in my car, was i suposed to hook the canister up to it somehow? if so which line goes where?

 

Emission rules say if your upgrading and older car the emissions also has to be upgraded. If the 95 doesn't have the canister you don't need it. Plug the line.
I can't imagine a situation that would build enough vacuum to collapse a gas tank. If someone can create such a scenerio I'd like to hear it.

The 1/4" line.