Loud intake manifold
Thread Starter
Teching In
Joined: Apr 2024
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Loud intake manifold I just got a jeep tj with a 5.3. The holly intake manifold is super loud. But when I put my hand on it, it stops making the noise. I also tried tightening it down, all bolts are tight. And tried a zip tie with some foam under neath it, still makes the vibrating noise. Put up a little video for reference. Thanks all for the help and suggestions.
https://youtube.com/shorts/Cv9XdFIwHyA?si=_Df5jPnYqGsJiNXL
https://youtube.com/shorts/Cv9XdFIwHyA?si=_Df5jPnYqGsJiNXL
TECH Senior Member
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
Is it a short passage sheet metal intake? It could be from intake harmonics.
If you were to put a stock truck or LS6 intake on it, it would eliminate the problem and run better too.
Those intakes are only good at high revs. they lose low and midrange power compared to OEM intakes.
Sometimes badass looks just aren't worth it.
If you were to put a stock truck or LS6 intake on it, it would eliminate the problem and run better too.
Those intakes are only good at high revs. they lose low and midrange power compared to OEM intakes.
Sometimes badass looks just aren't worth it.
Thread Starter
Teching In
Joined: Apr 2024
Posts: 2
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Its the Holley sniper efi one. If a stock one would run quieter and better I'm definitely not opposed to putting one in there. I assume all the sensors and throttle body will work with the factory manifold. I'm used to diesels so excuse me for my ignorance.
Joined: Apr 2006
Posts: 3,890
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From: Grand Rapids, Michigan
A stock intake not only will sound better, it'll boost your torque about 20 lb.ft. under 5000 RPM. Find a TBSS intake, which I think will fit in your Jeep. Those are the best performing cathedral port intakes. I just got one at the pick and pull for $45.
Thin aluminum can resonate and make noise like that. I had a modified HSR intake that had the top ribs removed that did the same thing. I ended up using a bolt to put a little load on the center of the top intake panel (similar to placing your hand on it) and it stopped the issue.
