Failed pressure test passed emisions

[No Face]

Hows everybody doing? Alright so I passed emisions with flying colors with my high flow cat and alcohol so I'm feeling pretty good. Now what can I do to diagnose the pressure if it obviously doesn't have to do with the charcoal canister? I can use the access to the fuel pump and top of tank a little bit in the trunk what do u guys recommend I do?

[No Face]

I did. A little research and someone said to do this"replace the small o ring where tank and filler neck meet fuel pump mounting gasket and fill your tank up like top it off tell you spill over. also check breather lines ad or cap them off tell after the test"
does checker auto or auto zone have that o ring and I there a write up to access it?