I'm doing a MAF swap but yes it's presently SD. Do you not have to keep the charcoal canister to avoid gas fumes under the hood?
Yes youll have gas fumes,if you remove the charcoal canister.
If you want to test this scenerio,disconnect the hose from the canister,thats coming from the fuel tank,and leave it open.Disconnect the other hose from the canister,thats coming from the purge valve,and plug it so you wont create a huge vacuum leak.
Take the car for a test drive/check for fumes....
Park the car at idle/check for fumes....
Shut the engine off/check for fumes....
BTW-most people that delete the charcoal canister delete the purge valve too.Some people that delete the charcoal canister & purge valve will then connect the hose (thats coming from the fuel tank) directly to the intake vacuum fitting,instead of leaving it open to atmosphere.That wont work.It'll cause the engine to run rich due to the fuel vapors being constantly ingested by the intake.Thats the reason why a canister and purge valve is used,so the vapors can be stored until the computer purges them into the intake.They are normally purged right after startup and during cruise mode.Purging them during cruise richens the fuel mixture.This causes the o2 sensors to trigger a rich condition,which then causes the ecm to lean (reduce) the fuel mixture.A lean mixture at cruise is better than a rich mixture.
When the engine is shutdown,vapors flow into the canister and stay there until the engine is fired up again.
Its Imperitive to leave that hose open to atmosphere,once you delete the components listed above,because thats what allows those vapors to escape now.Wherever you decide to locate that vacuum hose is ultimately the area where youll experience the fumes.
The only other method you could use to vent the tank,if you wanted to plug the vacuum hose,would be to install a vented gas cap,but the fumes are still gonna be present.They'll just be relocated from the engine bay to the gas cap door.lol.
The oem gas cap has a valve built into it.It acts to allow air into the fuel tank to replace the fuel as it is used.