Whistling sound engine bay

[orbital70]

Hi all
Have a 2012 Overland Crd 133,000 on clock sometimes when I start engine hear a whistling noise in engine bay. With hood opened looking at engine sounds to be from drivers side of engine. If driving and accelerate hard sound seems like it goes away but when reach normal speed and just accelerate to keep constant speed sound returns. Might have sound for week or two not all the time but regularly then won’t hear for couple months. Had Jeep look at last service but sound not there at service time.

Wondering if anybody has has anything similar happen.

Thanks

[J33Pster]

Yes, I have a 2012 Limited CRD and have also occasionally experienced exactly what you describe. Have no idea what it is and it disappears after a few days not to return for weeks or months.


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[Baxter]

I have a high pitched sound that only appears when the fuel tanks are low

[Mousie]

Remote chance it can be a warped exhaust manifold but never heard of that on Jeeps. Easy to spot with a light to see if soot trail around the flange to block. Fuel pump in tank is usually left rear passenger side and listening for it just below the sill.

[sege]

Originally Posted by Baxter

I have a high pitched sound that only appears when the fuel tanks are low

I have a similar problem which is Fuel Line Resonance and my mechanic regularly checks if lines are touching body parts. I suspect the low tank episodes are due to fuel pump resonance in the tank.

[MattG]

Not sure if it's the same noise, but I've had an occasional high pitched noise in my 2012 CRD GC pretty much since new. Original dealer replaced the fuel pump, but it has come back since then. New dealer said something similar about fuel line resonance. Possible fix is to get them wrapped or something. Normally it goes away after the car sits for a while - ie. I hear it on the way to work, but when I get in to go home it's gone. Then don't hear it again for months. I wondered if it was a temp thing - seems to happen on cold mornings.

This is a clip I made of the sound:

You Tube

[sege]

Originally Posted by MattG

Not sure if it's the same noise, but I've had an occasional high pitched noise in my 2012 CRD GC pretty much since new. Original dealer replaced the fuel pump, but it has come back since then. New dealer said something similar about fuel line resonance. Possible fix is to get them wrapped or something. Normally it goes away after the car sits for a while - ie. I hear it on the way to work, but when I get in to go home it's gone. Then don't hear it again for months. I wondered if it was a temp thing - seems to happen on cold mornings.

This is a clip I made of the sound: https://www.youtube.com/watch?v=EQNf...ature=youtu.be

Yep that's the one Fuel Line Resonance....... Well according to my mechanic at Jeepkraft!