Emergnncy I need to solve that situation right away !!

Today my toyota was leaking by the charcoal canister fuel.
I did untight my gascap and it did stop I never had this problem before I need some help asap.
I am thinking that the gas cap might not be ventilated and did create pressure is there somebody who can help me .
my truck is with a carb and a mecanic fuel pump

I always toyota truck and never had a problem like that before
i have mecanic fuel pump and a carb on it

If everything is as stock, the non vented cap should work fine, tank to fuel pump, fuel pump to return line on tank, tank vent to charcol canister, canister to carb. My thoughts are maybe the return and vent are connected backwards at tank, or the return from the fuel pump is connected to the canister. The main fuel delivery and the return line are the 2 connections together at the tank that come out of the sender unit, the vent line is seperate and comes out of the tank by itself. Another idea is if the canister was relocated it might be mounted too low so its filling with gas, and on a hot day with expansion, or a full tank will leak fuel out? Good luck.

I was gonna say that the lines are prob on backwards fir the return and the vent. I have seen that happen a couple times before.

ok I will check that this is my 15th toyota truck and I never experience that situation before

problem solve i put the wrong hose to the canister problem fix thank's for the help