Identify all the air hoses that are AFTER the AFM (ie, this is air coming in that is not accounted for). Then spray em with something. Some people use carb cleaner, but that scares some people, so I believe there is something specifically for tracking em down. If it gets in, it will kinda make the idle jump or something. I dunno what it's called, sorry, go to kragen and ask someone who kinda knows what they're talking about!