Hunting idle issue

[MuRCieLaGo]

Originally Posted by XfireZ51

If it was in the fuel pressure regulator hose, it should not have been. It was blocking vacuum to the FPR and so not allowing correct fuel pressure.

Question is why would someone do that?

So you're saying I should have left it there? I just threw it away... I don't get it. Could it be related to my issue? Do you think I can get another one at the dealership, or somewhere else?