I have a 94 civic hatchback with a b20/b16a2 head. I planned to rerun the fuel lines with -6an ptfe braided, i have an insane amount of fittings including the snap on for the walbro and oem top to swap to braided. I will be purhcasing a rubber hose for return line.
However I am having issues figuring out what to do with the vented like. There are 3 lines running out near my gas tank, obviously 2 on top of pump. What should I do with the vented line when I identify it. I have been told to turn it to braided and mount it up in the engine bay. I have been told to cut it an inch or so above where it begins. I have been told alot. and now im reaching a week nonstop trying to research this and i have literally found nothing specific about it except things I find odd, like that it goes to your throttle body. and intake manifold. or it goes on your fuel pressure regulator. which obviously doesn't do to double feed line and then fuel rail then return. So what am i missing here. lol
please I could really use some help. I am finding google and youtube to be LESS than helpful in any way.

 

Your OEM fuel tank vents through a 2-way valve mounted to the top left of the tank. You can access this behind a plastic cover if you get under the car and look. The 2-way valve has a rubber hose that runs to the tank, and then one that runs to the hard-line that runs under the length of the car up to the engine bay. In the engine bay, this hard line connects to the charcoal canister mounted on the firewall near the battery. The charcoal canister has a small dashpot on top that is controlled by the purge solenoid, mounted on the back of the intake manifold. It also has a red braided line that goes to the top of the throttle body, which terminates in a small hole just BEFORE the throttle plate. Periodically, the ECU will activate the purge solenoid which will allow the vapors collected inside the charcoal canister from the fuel tank to be sucked into the engine.

Now, if you are maintaining the stock evaporative emissions control system (charcoal canister, purge solenoid, etc.), you can leave the fuel tank vent line as-is. If you are deleting the evaporative emissions control system, you can leave the vent line open to atmosphere in the engine bay. Some people claim they can smell gas fumes when doing this, however. Another option is to disconnect the rubber hose going from the 2-way valve to the hard line that runs under the car. This will allow the tank to vent near the back of the car and away from the fresh air intake cowl, reducing the chances of smelling gas fumes in the cabin. I do not recommend blocking off the vent line or removing the 2-way valve from the tank.

 

Okay well the canister on firewall in the engine bay is removed as far as I know my skunk2 ultra intake manifold doesn't have a purge on the back of it.
I Had someone doing the job and he's no longer around he relocated. So I'm left trying to figure this out.
I know it was explained we'd be running 6an feed line with inline filter right before fuel rail, with pressure regulator and gauge, then return off rail back to tank.
Never was told anything about a vent line?

 

My recommendation is to disconnect the 2-way valve (at the tank) from the hard line that runs under the car. Then you can remove the hard line from the engine bay / under the car if you desire.

Or you can just leave it how it is. Just don't pinch / cap the vent line. The tank needs to vent.

 

Yeah it already punched but I could cut a piece with a pipe cutter.
I was told not to separate the two way. At this point lol

 

I am not telling you to remove the 2-way valve. In the diagram below, I have circled the 2-way valve in blue. Leave the rubber hose circled in red connected between the tank and the 2-way valve. Remove the rubber hose circled in green from the 2-way valve and the hard line that runs under the car.