Annoying gas tank issue

I have a pretty annoying gas issue and have no idea what it is.
Whenever I go to the gas station I have to hold the handle up and set it on the slow setting so I can fill the tank up. The truck doesn't like to start sometimes with a full tank. I've noticed the problem is worse when on an incline. I took it wheeling last week, stalled on a hill and couldn't get it started for a minute or so. It Seemed to have helped it start when I gave it gas while it was turning over.

After I get it started it seems to run fine. Only on startup I notice an issue.

Any ideas?

EDIT: No Engine light

 

bad charcoal canister

 

I kind of figured. Is it bad if I leave it as is? Or is it something I should replace ASAP.
I know they are pretty pricey.

Anything else it could possibly be instead? Just so I know for sure before I throw money into it. Never had this issue before.

 

Sounds similar to what I've been experiencing.

Truck has difficulty starting after fueling - long crank time then runs very rough for 15 seconds, then everything is fine. If I put gas in while the engine is running it starts to buck then it's fine when fueling is complete. Not nearly as bad if I run the gas pump real slow.

Recently happened once while parked on an uphill incline for 4 hours on a very windy night where the wind was shaking the vehicle, but otherwise only (and always) at the gas station.

I was thinking that the turbulence in the tank was causing the fuel line to drain back by shaking open a faulty check valve or flap or whatever, but just a wild guess since I don't really know what the fuel pump/fuel line set-up is like in there.

 

Bump!