That is strange. Does is your idle sporadic almost dies low rpms 400 500?
ill have to double check that aswell. ill take my air hose to it tommor with the airintake off and see if i can hear any air go thru ! thanksI don't think its open, actually quite sure it not. It is just a what looks to be an opening for some kinda valve but nothing is there. Probably used in many of any other applications that it could be for just not our Mazda's.
If that big hole was open I doubt the car would run.