If you can not detect air flowing from the purge pipe when you blow into the tank pipe ( on the filter) then it means your check valve is blocked. You can attempt to blow it clear with compressed air or you could follow the thread that @LandCruiserPhil started regarding how to remove the check valve. This process will not suit every one but I have used it now on 3 different vehicles and it is a winner every time.Using a clean section of fuel line, I attempted EC -> 1.0 -> 10(a) from the FSM for the charcoal can test.
Depending on who you ask, us humans can produce between 1 and 2 PSI (or more, dunno) it did not pass that, will try the other steps tomorrow.
(I dont have a regulator that goes down to 1 PSI)
Re-located the front diff breather since the line for it was more or less mush.
Fuel line is expensive nowGates 1/4 is $3/foot
I put an end to my Charcoal Canister problems for good! - https://forum.ih8mud.com/threads/i-put-an-end-to-my-charcoal-canister-problems-for-good.958684/