I have a ticking sound and i think it's coming from my egr block off plate on the passenger header, but i was wondering, if my blockoff plates on the back on the intake were leaking what kind of noise would it make, and could i tell if i had a leak me looking at my sensor readings with my scanner? Like maybe the MAP readings for instance? Any help would be appreciated. BTW i plan on taking the header off later this week to get the block off plate welded shut on the header.

 

Header Leak...