02 Protege5 sputtering noise near air box
 

I just noticed this after driving for a while today. There was a sputtering noise coming from the air box area. it was doing it and then it went away for a minute then started again. I have no CEL codes or anything. idle seems affected slightly when it does this, but it's not severe. what could that be? here's a video of the noise and where it's coming from. Thanks in advance!



I'm Paul by the way, a new Protege owner. I posted an intro and a pic before but not sure it posted. anyway, Hi!