Car stalling at idle after topping it off.

I can tell you how to verify it. Get a bunch of wood clothespins and clamp them on all of the metal fuel line you can get to. A bunch of um. If the problem goes away, it's vapor lock. It's actually very rare to have real vapor lock though.
Absolutely going to do that tomorrow. I live in Bakersfield so its just now reaching 100 degrees so it makes sense as to why I am having this issue now. But yea I will see if the pins fix it!