Idle air control valve noise - JeepForum.com
 
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post #1 of 14 Old 04-19-2017, 06:45 PM Thread Starter
97wrangler4me
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Idle air control valve noise

is it possible that the IAC can be making a very loud whistling sound
this seems to be where the noise is coming from


ruled out water pump and the belt and the pulleys and alternator.
thank you to all, it is a puzzle to locate noise


this is a loud ear piercing whistle

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post #2 of 14 Old 04-19-2017, 06:55 PM
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Quote:
Originally Posted by 97wrangler4me
is it possible that the IAC can be making a very loud whistling sound this seems to be where the noise is coming from ruled out water pump and the belt and the pulleys and alternator. thank you to all, it is a puzzle to locate noise this is a loud ear piercing whistle
Intake/exhaust manifold leak, or a vacuum leak somewhere.

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post #3 of 14 Old 04-19-2017, 11:02 PM Thread Starter
97wrangler4me
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the noise is up top under the air intake cover.


it dose not sound an exhaust leak
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post #4 of 14 Old 04-19-2017, 11:46 PM
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Quote:
Originally Posted by 97wrangler4me View Post
the noise is up top under the air intake cover.


it dose not sound an exhaust leak
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And your driving a what???...
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post #5 of 14 Old 04-20-2017, 11:52 AM Thread Starter
97wrangler4me
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97 wrangler 4 cylinder 2.5 L all factory equipment no changes. 80,000 miles.
both O2 seniors' changes, air filter new clean. whistle has been getting louder went from a chirp to all the time after jeep get wormed up. stops when speed is plus 45,let off gas whistle is back.
thanks.
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post #6 of 14 Old 04-20-2017, 12:35 PM
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throttle body gasket?


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post #7 of 14 Old 04-20-2017, 03:49 PM
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Do you have a throttle body spacer installed? They tend to make a whistle.
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post #8 of 14 Old 04-20-2017, 08:08 PM Thread Starter
97wrangler4me
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no the jeep has no aftermarket on it
I was thinking of taking it to the jeep shop on MONDAY
THIS IS SO LOUD THAT A LITTLE BOY I KNOW PLUGGED HIS EARS
SCREAMING LOUD, EMBARRASSING LOUD
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post #9 of 14 Old 04-20-2017, 08:47 PM
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Quote:
Originally Posted by 97wrangler4me View Post
97 wrangler 4 cylinder 2.5 L all factory equipment no changes. 80,000 miles.
both O2 seniors' changes, air filter new clean. whistle has been getting louder went from a chirp to all the time after jeep get wormed up. stops when speed is plus 45,let off gas whistle is back.
thanks.
That information would be useful if added to your profile...
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post #10 of 14 Old 04-21-2017, 09:39 AM
Hawk37
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Is it like
Seems like a lot of boards are suggesting loose manifold bolts like blubaru2002 said. Of course its probably the two closest to the firewall that are a pain to check.
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post #11 of 14 Old 04-21-2017, 11:56 AM
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Well of course, it's never the easy ones.
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post #12 of 14 Old 04-22-2017, 11:39 AM
GilaMtnJeep
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Pretty common issue. Check all your intake bolts(manifold, TB, etc)

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post #13 of 14 Old 04-23-2017, 11:38 PM Thread Starter
97wrangler4me
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Pretty common issue. Check all your intake bolts(manifold, TB, etc) thanks GilaMtnJeep


I will check the bolts in the morning. If that dose not fix it My plan is to take it to the jeep shop
again thanks for all the advice I have been checking what I can of all the things all have suggested.
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post #14 of 14 Old 04-24-2017, 05:19 PM Thread Starter
97wrangler4me
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A BIG thank you to all who answered my call this morning I tightened all the intake and exhaust bolts
all is well again, sure nice not howling going down the road.
here is a box of low fat chocolate for all the help.
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