Originally posted by VTECseoul
i woulda said it's the drive belts (if it happens during startup when cold) or the brakes if you're driving in stop/go traffic alot. if the skreeching is loud & irritating, like it's embarrassing, then get it checked out. but if it's kinda low volume, then it might be the air passing thru the throttle body & it's butterfly valve, same principle as whistling.
well, it only happens after the car is warmed up. drive belts was one of my presumptions. as for soundwise, it's just irritating and can only be hear after the car is at idle. i'll swap out my aem and put my stock airbox in and see if the problem still arise... if not, then for sure the aem is the culprit... but if it still does... then could be the drive belt.
any other ideas?