So I have been chasing a stereo issue that when I start my car I get some weird noises coming in. I did not get this noise in accessory mode. So today I turned the key right before starting it and I heard the noise. I started to get out of the car and I said….wait a minute the same noise seems to be coming from the hood. I opened it up and it was loud. However I have no clue what it is but it seems to be right under where the fresh air intake goes into the engine.when I put my hand at the end I can feel it

Here is a video
https://1drv.ms/v/s!AlqvkJlqOE7qhL4_1F_7klx-pCzA6Q

 

Can't seem to get to any video but your heater pump is in that area although a little lower down.

 

I have read a little, and some say it is the Throttle Body servo. However, this is affecting my entire stereo installation. I have been tracking down an engineer noise for weeks and it seems that this is it. I am wondering how to suppress that noise if this is normal. By the way if you hear the popping sound in the background that is my radio from this servo.

After reviewing the electrical manual I am seeing that this is the Throttle Motor? ZNot sure if I can put a noise suppressor on that.

 

Update - I found the problem. So I was using the accessory wire for the original AMP in the trunk for my DSP. I'm not sure what is causing it, but there is a pretty big HUM coming through that line, and it must be on the same circuit as the Servo or the wire in the car is near it. I took a wire directly from the radio accessory and hooked it up to the DSP outside of the car, and the noise was gone. I am telling you this noise was terrible. Popping, high-pitched squeals and got very loud to the point that I thought it would blow my speakers.