Hi everyone

Just picked up my first S2000. 2003 with 145k on it. Starting to sort through all the maintenance items and can't locate the source of this humming noise in the engine bay.

Here is a link

I removed the Serpentine belt and the noise remains. So that eliminates any pulley's. The noise is coming from the front part of the engine. I removed the air box cover and the sound increased. Could it be from the air filter?

Thanks for looking.

Mike

 

Thats fine shut the bonnet

 

Update:

Removed and cleaned the Throttle body and the idle air control valve.

Sound remains. I noticed it only starts once the car is warmed up.

Any thoughts?

Thanks!

 

Put the airbox lid back on,there is baffles in there that eliminate the noise under induction psi.

 

This sound is normal.