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Old 05-05-2010, 11:34 PM   #1
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AEM Brute Force Intake WHISTLING

My intake is whistling (loudly) everytime I accelerate and then gets louder when I level off the throttle. I end of feathering the accelerator just to keep it from constantly doing it. I just cleaned it 2 weeks ago (correctly according to AEM directions) Now that my top is off it is incredibly distracting and really irritating! Any ideas why or how to fix?


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Old 05-05-2010, 11:42 PM   #2
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so you put a new high flow filter or a intake manifold i am confused. i bought one of the cone filters for a car once and it did this, but only when accelerating. so i would say if its the filter then your stuck.

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Old 05-05-2010, 11:43 PM   #3
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Did you also put the throttle body spacer on? Those are generally what causes the whistle...
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Old 05-06-2010, 07:45 AM   #4
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Did you also put the throttle body spacer on? Those are generally what causes the whistle...
No I did not. I'll get one today and see if that fixes it. Thanks for the help!
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Old 05-06-2010, 11:31 AM   #5
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I called AEM's tech support and they said that the whistling was normal because I removed the restrictive stock air intake system that muffled the "natural sounds of your engine." Apparently I'm supposed to drive around sounding like a jet engine when I accelerate. That's crap. Is there anyone else that has the AEM air intake system that doesn't have a whistling problem out there?
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Old 05-06-2010, 11:38 AM   #6
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I have a K&N and it does the same exact thing.
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Old 05-06-2010, 11:57 AM   #7
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I've read many an article where people have put on aftermarket intakes, and the majority of them whistle or make some sort of noise. The throttle body spacers seem to do the same thing.

One of the reasons I'm keeping mine stock. It would drive me bug nuts.
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Old 05-06-2010, 01:33 PM   #8
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One of the reasons I'm keeping mine stock. It would drive me bug nuts.
It is driving me nuts. I'm about ready to put the stock one back on. I'm going to stop by the 4X4 shop and see if they have any suggextions first. The annoyance is not worth any performance gain I may or may not receive from it.
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Old 05-06-2010, 04:44 PM   #9
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make sure that all of your clamps are tight, my brute did that and it turned out that there was a kink in the hose.
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Old 05-07-2010, 03:45 PM   #10
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It is driving me nuts. I'm about ready to put the stock one back on. I'm going to stop by the 4X4 shop and see if they have any suggextions first. The annoyance is not worth any performance gain I may or may not receive from it.
Hey if you put stock back on then send ur brute this way...I don't mind the whistle
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Old 05-07-2010, 06:50 PM   #11
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Mine does the same, even worse after I bolted a 4.0 TB on my 2.5.
You are forcing alot more air into your intake than it was designed for.
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Old 05-07-2010, 10:55 PM   #12
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Mine does the same, even worse after I bolted a 4.0 TB on my 2.5.
You are forcing alot more air into your intake than it was designed for.
did u notice any HP gains? or throttle response?
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Old 05-08-2010, 07:11 AM   #13
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Just get rid of it
go back to stock
I would last 1 minute with
that whistle
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Old 05-08-2010, 09:33 AM   #14
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I did notice a difference with the bigger TB. I live in vermont and there are alot of hill's. The little 2.5 gained some power to get over them easier.
Maybe a little more high RPM power to.
Downsize it has a High Idle at start for a minute or so until the ECM figures out whats going on.
Couple weeks back I swapped in a Accel ignition coil. The old was getting week. I gained better throttle response and maybe a little more power.
If I was to do it all over Again I would have started with a 4.0
I have done: Electric fan,2.5" exhaust flowmaster 40 mufflers and high flow cat.
4.0 TB,cold air intake and coil.
Overall the 2.5 is a annoying little engine on the road,but decent offroad.
I am hoping next year to swap in a V8/sm465/231. have been gathering part's.
Need to finish up my scrambler first.
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Old 05-08-2010, 12:49 PM   #15
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Of course it's going to whistle. There's more airflow. just as a strong wind makes a howling noise, that much air moving that fast makes a whistling.
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Old 05-09-2010, 12:57 AM   #16
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Quote:
Originally Posted by scrambler1 View Post
I did notice a difference with the bigger TB. I live in vermont and there are alot of hill's. The little 2.5 gained some power to get over them easier.
Maybe a little more high RPM power to.
Downsize it has a High Idle at start for a minute or so until the ECM figures out whats going on.
Couple weeks back I swapped in a Accel ignition coil. The old was getting week. I gained better throttle response and maybe a little more power.
If I was to do it all over Again I would have started with a 4.0
I have done: Electric fan,2.5" exhaust flowmaster 40 mufflers and high flow cat.
4.0 TB,cold air intake and coil.
Overall the 2.5 is a annoying little engine on the road,but decent offroad.
I am hoping next year to swap in a V8/sm465/231. have been gathering part's.
Need to finish up my scrambler first.
well if u don't want the TB or intake i'll take it off your hands...I have been trying to get my hands on a new TB without paying up the arse...lol
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Old 05-09-2010, 08:58 AM   #17
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You should be able to pick up a TB for around $25 at a salvage yard.
Cash for clunker's filled the yards with zj's,xj's.
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Old 05-09-2010, 11:07 PM   #18
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my dad has the aem on his jk and it whistles pretty loud.

the 4.0 throttle body is the way to go. I remember the first test drive...I pretended I had a turbocharger...
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Old 05-10-2010, 10:35 AM   #19
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You should be able to pick up a TB for around $25 at a salvage yard.
Cash for clunker's filled the yards with zj's,xj's.
I did pick one up at a junk yard but it was from a cherokee and was missing a vacuum hose tube on the side. (didn't realize it at the time) the junk yard here wants $105 for a TB with the hose port on the side
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Old 05-13-2010, 12:51 PM   #20
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I did pick one up at a junk yard but it was from a cherokee and was missing a vacuum hose tube on the side. (didn't realize it at the time) the junk yard here wants $105 for a TB with the hose port on the side

Wow, Maybe ebay? I grabbed mine off a XJ I stripped.
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Old 05-13-2010, 06:20 PM   #21
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there are a few for sale on greatlakes 4x4 .com i think one is milled out straight though. no taper fot like 85 i think.

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