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Help diagnosing whistling noise

2K views 9 replies 6 participants last post by  Pebbledropper 
#1 ·
The video below was taken from inside my jeep -obviously- while parked with the motor running.

You may have to turn the sound up but you should hear a high pitch whistling in the background. That sound is not an artifact of the video recording. My jeep is actually making that noise. The recording does seem to have amplified it some because it isn't that loud in reality. If the radio is on at moderate volume you really can't hear it. It does also happen while driving but that is a little harder to record and it can be harder to make out above the road noise. Doesn't seem to vary with throttle or anything like that but again hard to tell due to how faint it is and engine/road noise.

I've been there and done that with the water pump issue (at only 500 miles) and I don't think this sound is that. You cannot hear this outside the jeep unless you lift the hood and listen real real close then you can maybe just barely make it out above the engine noise.

I've done some searches and most results are for TJs or are a few years old at this point. Possible things found in my searches - vacuum leak, normal noise for this throttle body design (not sure what that means but I think this would come up a lot more if that were the case).


I haven't been able to track it down and its driving me nuts. 2014 JKU Rubicon, no engine or performance mods or anything like that.

I just wanted to see if there were any other ideas or if anyone has experienced this lately and what you did about it. Any troubleshooting tips to track it down?


https://www.youtube.com/watch?v=pduUXIg4q-k
 
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#2 ·
Nobody eh.

Paid more attention to it today and it seems to be there only when idling but not sure given once you give it some gas you get more engine noise...

May just take it to the dealer.
 
#4 ·
Thanks for the idea. I'm afraid taking it in is going to turn into one of those things that they can't reproduce or never seems to happen when they drive it and so on... Was really hoping to avoid all that but I think you're right. I'm going to have to bite the bullet and deal with it.
 
#6 ·
Dos you get this worked out? I had a whistle that drove me nuts, checked everything. It fluctuated with acceleration, so I thought it must be engine related. Finally realized that it was a bad ground on my aftermarket amp, causing it to push the vibration of accelerating through the speakers, even if the stereo was off. Simple fix, and so glad I FINALLY killed the noise!
 
#7 ·
Dos you get this worked out? I had a whistle that drove me nuts, checked everything. It fluctuated with acceleration, so I thought it must be engine related. Finally realized that it was a bad ground on my aftermarket amp, causing it to push the vibration of accelerating through the speakers, even if the stereo was off. Simple fix, and so glad I FINALLY killed the noise!
No, I still haven't sorted this out. I know what you are talking about from my younger days when I was into the car audio stuff. I don't think it is that but its a good thought.

It doesn't seem to be engine speed dependent other than the jeep has to be running. Sitting in park, driving down the road, it may be there. But, sometimes its not, or its so faint I can't hear it anyway. Also, when first firing it up after sitting for awhile it won't be there, so engine needs to warm up a little.
 
#10 ·
I have bad whistle, too; but it's coming from my Rigid 30" bar on the front of my roof rack.

Jerry
 
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