I seamfoamed a few days ago. Ever since revving really high to get all the gunk and exhaust out, i've been hearing a scratching/chattering kind of sound. I heard it for the first time when i was idle at a red light..it was LOUD and very distinct. I revved it once and it died down. Since then I can hear just a little bit of it usually when I'm decellerating at a low speed.

It sounds like its coming from around the intake...Could it be the MAS? What could i have broken by revving it maybe around 5k rpms?
I dont recall ever revving it that high before.

It hasnt affected the performance, but I hate the noise and want to get rid of it because it's not normal. Does anyone have any idea what this could be?

 

I hear a noise kinda like you describing on my AFM. I'm not sure exactly what it is I don't think you broke anything revving to 5k you might have just noticed that noise then and now you're hearing it all the time

 

could of vibrated somethin lose. After yarding on my engine one afternoon a heatshield on the exhaust rattles now. =P

 

sometimes the bolts on my intake rattle lose a bit, and they make a horrible noise when the rpms would drop, take a look at those bolts, one might be a tad lose, its also a tad unnerving to hear it too!