How to delete S13 charcoal cannister / Evap system

[ph1tnessjunk1e]

Originally Posted by KiLLeR2001

As I expected I knew some information would be flawed.

The fuel check valve works as an equalizer for the fuel tank. On hot summer days, there will actually be positive pressure that will accumulate inside the tank. If you only install a one-way valve (vacuum) or keep the fuel check valve but block off the fuel vent, you will have problems. And by problems I mean premature fuel pump failure.

The fuel check valve will release a little bit of fuel vapor when the pressure exceeds X amount of psi. The fuel cap is vacuum only for S13's. If you vent to atmosphere with no fuel check valve installed, then you basically have an open system and moisture will creep into the tank and then you can say hello to a rusty S13 fuel tank for me.

If you want to block off the fuel vent, you can, but you must install an OEM S14 fuel cap because that acts as a two-way valve just like the fuel check valve.

Personally, I have an S14 fuel cap and a functioning fuel check valve so that way if one fails, the other is there as a fail-safe. I left the factory hard lines alone so it vents out right where the charcoal canister was. Been running it like this for 6 years and no IMPLOSION/EXPLOSION has occurred (like you are implying).

Ok, I want to make sure I do this right so I want to confirm my understanding.

Venting to the atmosphere, even with a filter like the original post says, is not good. In order to properly do this, we must use a S14 fuel cap and fuel check valve that releases pressure at a certain PSI - both are needed if redundancy is desired.

Is that right? If yes, what fuel check valve did you use? Do you know the PSI at which the factory valve releases pressure?