You should have some suction, just not a lot.
Also, you know the ccv is right behind the disa, and it wouldn't surprise me if it does buzz when it's failed a certain way. It makes a chewbacca noise, why not buzzing?
Just doublecheck your assumptions before you buy a disa. I know they fail, but I also know mine hasn't...though my and everyone else's ccv has failed after so many miles.
I wish there was a better test for ccv failure than the sucking bag!
Upcoming comedy shows: March 3 at Broadway Comedy Club, NYC, 8 p.m. March 5, Tierney's Tavern, Montclair, NJ, 7:30 p.m. See Facebook for other shows and PM me if you can make one...love to see you there!
Mangofy your E46!