Hi Everyone,
After the car has warmed up and when idle I am receiving a beeping or low pitched whistle noise from the engine.
It starts with it being intermittent but then becomes constant.
This only happens when idle.
Any thoughts as to what is causing this?

 

Is it an electronic noise? I think I have a "beep" that is more constant coming from the throttle but it is a longer tone, pretty high pitched and it actually goes away at idle unless I hit the accelerator. The only reason I am not stressed by it is that I assume it is related to the alternator cable and/or the alternator, so I further assume it will go away when those things are swapped out.

 

Take a video, upload it to YouTube and then post the link here. A pulley when the bearing goes bad can cause a squeak noise that could sound like a beep. Easy way to diagnose that is to remove the airbox, remove the serpentine belt, start the car and see if the noise is no longer present. If it's gone, after shutting off the engine, spin and wiggle all the pulleys by hand looking for the culprit that has side to side play, doesn't spin smoothly, or makes noise.

 

Do you have any audio cable plugged in? If your audio cable is laying on the floor it transfers a weird sound into the speakers