EGR Valve Symptoms

Kinda in an akward situation as Im doing some work to my car over winter so I cannot really check for results. So far I rebuilt/cleaned all of my injectors and decided to change out ALL of the vacuum lines. In the process I noticed I had a huge hole melted in the line that goes right to the EGR valve, big enough that I cant see the EGR opening at all.

Would this cause any major noticable symptoms while running? I was having a lot of hesitation problems, could this be the cause? THnx for any help.

Alrite, but what I am saying is that EGR would not have been oprning with the size of whole it had in it. The whole was bigger that the ID of the vacuum tube. I was only having problems at part throttle, almost felt like it was pulling timing, sometime to the effect of a pop in the header. Any of this help to further narrow it down?