Buzzing sound from firewall side of engine, please help

[Unreal89]

I have a 6 bolt motor in a 2g with a rebuilt bottom end and BSE kit. The engine, when revved over 3k rpm, will have a buzzing sound come from the firewall side of the engine. I have no idea what it could be. It gets faster the higher the revs. I do not know what to think of it.

Any ideas? Thanks.

 

[kevingst]

Do a boost leak test to see if anything around your intake manifold is leaking... maybe a gasket or something acting like a diaphragm.

 

[Unreal89]

still waiting to do the boost leak, i dont have the things to perform one. Any one else have some idea's for the time being? thanks

 

[TSIfreek]

Could be your idle air control valve. As it has an electric motor . Its atached to and underneath the throttle body. If you put your hand on it you can feel it working when you turn the key to the on position.