that might be it, but double check the vac lines behind the intake under the cabin air filter housing. If you moved that around when removing intake, they get dry rotted and crack pretty easily. Remove the panel the cabin air filter housing screws into to make access easier...that is, if this stud doesn't fit the issue.
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!