Join Date: Sep 2008
Location: Fruitland Park,Florida
Modern fuel systems are not vented to atmosphere. I would say that line allows venting air into tank. The venting lines going out of sender go to charcoal canister, then from canister to intake.
That way fuel vapor is contained and burned in engine. Tank still gets venting air in, but no air out to atmosphere. Pressure in tank gets relieved by going to canister then to engine. This is why gas cap makes noise when you remove it sometimes.
Last edited by cocobolo95; 08-22-2015 at 06:26 AM.