Whine coming from under the hood

DWG · 11-21-2011, 06:24 PM

Hi, I just picked up a 40th anniversary and was messing around with the bluetooth in the garage and noticed that sometimes when the ignition is in the "ON" position there is a very high-pitched whine/buzzing coming from under the engine cover. It isn't there when the ignition is in the "ACC" position. I can also always hear it for a few seconds after I turn the engine off.

Is this normal for these cars?

It has the Stillen Gen III intake, if that makes a difference.

Thanks,
David

Bryan · 11-21-2011, 07:26 PM

My nismo makes a small whine also I think its the ecu. I've heard other people here say the same its not loud though and stays for a few seconds after I shut it off sounds like what's happening to you

DWG · 11-21-2011, 09:08 PM

Quote:

Originally Posted by Bryan

My nismo makes a small whine also I think its the ecu. I've heard other people here say the same its not loud though and stays for a few seconds after I shut it off sounds like what's happening to you

I'm pretty sure it's coming from under the engine cover, not the dash. I did a little more searching and found this: Whining Noise From Engine Bay

Someone states it is the throttle body. Any more info would be appreciated!

DIGItonium · 11-21-2011, 10:11 PM

IIRC, it's the throttle body. You can hear it when you put IGN to ON position. When you put it back to OFF, you can hear the TB moving around.

11-21-2011, 06:24 PM	#1 (permalink)
DWG Base Member Join Date: Oct 2011 Location: Altamonte Springs Posts: 21 Drives: 40th Anniversary Rep Power: 14	Whine coming from under the hood Hi, I just picked up a 40th anniversary and was messing around with the bluetooth in the garage and noticed that sometimes when the ignition is in the "ON" position there is a very high-pitched whine/buzzing coming from under the engine cover. It isn't there when the ignition is in the "ACC" position. I can also always hear it for a few seconds after I turn the engine off. Is this normal for these cars? It has the Stillen Gen III intake, if that makes a difference. Thanks, David

11-21-2011, 10:11 PM	#4 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 42	IIRC, it's the throttle body. You can hear it when you put IGN to ON position. When you put it back to OFF, you can hear the TB moving around. __________________

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11-21-2011, 07:26 PM	#2 (permalink)
Bryan Base Member Join Date: Jul 2010 Location: Houston Posts: 72 Drives: 13' STI Rep Power: 15	My nismo makes a small whine also I think its the ecu. I've heard other people here say the same its not loud though and stays for a few seconds after I shut it off sounds like what's happening to you