I have a 2001 Ford F-150 pickup with a gasoline engine. There is a thin metal flap on a spring that is supposed to cover the opening in the fuel filler neck, which the fuel nozzle would normally push out of the way for fueling.
While I was ineptly trying to add fuel from a poorly designed fuel can, this flap got bent and no longer covers the opening completely.
What is the correct name of this flap?
What is its purpose?
Is it a problem that it is bent?
If it is a problem, what is involved in fixing it?
I hope I've described the part clearly. If not, I can try to add a photo.