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Unread 01-18-2013, 11:12 AM   #1
VanderTJ
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2007 XK Commander 
 
Join Date: Apr 2009
Location: Birmingham, AL
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Whistling/Whirring Noise

Hey guys, I've been coming to this site for the last 4+ years getting great advice on all things Jeep. Now I've come to something that I can't really find in the forums, and I'm just looking for ideas on what could be up with my Wrangler.

A couple of weeks ago while on the freeway driving to Atlanta from Auburn I noticed a high pitched whistling/whirring coming from my engine compartment. It only occurred when I have been driving for a while (15 minutes +), and only when my foot was off the gas. When accelerating or giving it gas, the whistle/whir went away.

At first I suspected the vacuum hoses or throttle body spacer (installed before I bought the Jeep). I have since removed the throttle boy spacer and checked the vacuum hoses (along with replacing the power steering pump, water pump, thermostat, and thermostat housing which was a whole adventure in and of istelf), and the whistle/whir is still present under the same conditions as before.

Anyone have any ideas? Thanks in advance.

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Unread 01-18-2013, 02:09 PM   #2
medtech
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2005 LJ Wrangler 
 
Join Date: Jul 2006
Location: Mass
Posts: 56
mine does the same thing. I think it's coming from the hose connecting the alternator to the intake manifold but i'm not sure. I took a picture of where I hear the sound coming from.
pic1.jpg  
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Unread 01-18-2013, 07:00 PM   #3
mike78
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2002 TJ Wrangler 
 
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Check your intake manifold, had the same issue.
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Unread 01-18-2013, 07:46 PM   #4
PowderPusher
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1999 TJ Wrangler 
 
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look up tea kettle sound on jeeps. it usually comes from the intake mani. i heard of the bolts just needing to be snugged up again.
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Unread 01-23-2013, 01:37 PM   #5
VanderTJ
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Trying it out

OK, I'll try those bolts on the intake manifold tonight when I get off work then. Hopefully that will fix it. I don't think that it's hurting the jeep, it just gets really annoying on long road trips (repeated trips from Auburn to Atlanta or Birmingham every other week or so at 2 hours a pop).

Not to hijack this thread's main topic of noise issues, but my Corbeau A4 drivers seat just kind of broke. The seat won't go fully upright. If I have serious problems with that I may start another thread though to see if anyone has had problems with those seats.
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Unread 01-23-2013, 02:42 PM   #6
oakmckinley
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Quote:
Originally Posted by medtech View Post
mine does the same thing. I think it's coming from the hose connecting the alternator to the intake manifold but i'm not sure. I took a picture of where I hear the sound coming from.
What is that you took a picture of?
What kinda mods have you done there?
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Unread 01-23-2013, 02:44 PM   #7
VanderTJ
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It looks like

It looks like a pic of the top of the engine with a super beefy alternator and a cold air intake maybe? I'm not sure, but that's what I thought when I first saw it.
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Unread 01-23-2013, 06:26 PM   #8
Mick VT
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looks like a supercharger mod to me - yeah that would whistle
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Unread 01-23-2013, 06:36 PM   #9
2003RubiBlue
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I think MedTech is being funny because thats a supercharger with an intercooler.



And yes it would whistle.
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Unread 01-23-2013, 07:20 PM   #10
medtech
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Quote:
Originally Posted by 2003RubiBlue View Post
I think MedTech is being funny because thats a supercharger with an intercooler.



And yes it would whistle.
Yeah I was just being funny.
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Unread 01-24-2013, 11:50 AM   #11
VanderTJ
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I tried tightening down the intake manifold and it may have helped a little. Not a lot of road use yet so I can't truly comment on whether the noise has stopped. I'll also get under the jeep today to check the vacuum hoses.
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Unread 01-24-2013, 02:10 PM   #12
cconigliaro
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Let me know when you find out. My brother has the same issue and it only happens after driving for a while. We would hear it and pull over real fast to try and find it but you have to be quick before it goes away. We could never pin point it.
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Unread 01-24-2013, 04:34 PM   #13
oakmckinley
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Har har har
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Unread 01-25-2013, 08:49 PM   #14
EricaS
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Had the same issue for about six months on my 03 Rubicon. The noise kept getting worse, even accelerating wouldn't make it go away. Finally had a leak test confirm a shot intake manifold. Replaced and no noise since. Back to enjoying my Jeep.
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Unread 01-26-2013, 12:21 AM   #15
flying_bosun
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Quote:
Originally Posted by medtech

Yeah I was just trying to be funny.
Fixed it for ya.
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