fuel tank ventilation / evap system

[cp[mike]]

ive had my charcoal canister and evap lines/solenoid removed for some time now. i capped off the vent line. ive only noticed minor vapor pressure when opening the gas cap, nothing too serious.

now my question is, is it alright for a fuel tank to be completely sealed? does it need to be vented from a safety standpoint, or is that only done for emissions/evap control reasons? i was reading on another forum that a sealed tank with building vapor pressures makes to be a dangerous fire hazard but as anything on the net goes, there are a group of people who complain that any non-OEM mod is bad.

im just curious if i should bother venting it.

[NAiL05]

I think it would be safer. The EVAP basically just catches the fumes in the charcoal canister and such so it prevents it from venting into the atmosphere. But if I remember there was a purge on the canister too. Remember seeing one on the civic dunno if our accords have one...but I would think that is to relieve some pressurer in the system.

EDIT: I think it purges back to the tank though. Do you remember where the tubing went? Plus Our caps on our gas tanks are ventilated too so I think you can loop it like so but not too sure.

[arcadiacb7]

i just took mine off the other day. I don't think that plugging it is good even though gas doesn't blow off pressure unlike diesel fuel. I ran a tube from the vent line to the tank up to the spot on the TB where the vacuum line used to run to the evap cannister.

[Otto]

I believe there is a pressure release if there's more pressure than the EVAP system can bleed off through the intake line purge thing :P. I think that's by way of the cap and/or that valve thingy at the canister. As you can tell I'm not too sure.

[arcadiacb7]

it stores fumes and burns them off while you are running high r's constantly like down the freeway.