i searched and theres a lot of threads about this noise but none seemed to solve the problem. At a certain throttle range (not rpm) i get a loud whistling noise which i assume is coming from the throttle body. It sounded cool at first but its so annoying because if your going in and out of that throttle area the whistling goes on and off.
This thread seemed to explain the problem the best: https://honda-tech.com/zerothread?id=1409520
People said that the idle adjustment screw needed to be turned looser or tighter and I tried both...even all the way in and all the way out and it still didnt make a difference. ?????

 

the whistle is air traveling through. very noticable when there's an aftermarket air filter. totally normal. that screw they are refering to is for idle adjustment. if you idle is fine DON'T PLAY WITH IT!

 

ehh for some reason i dont think it has to do with the intake...all of my friends with aftermarket intakes dont have this sound. Theres the normal constant intake sucking noise but i think this i something different...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by philosofy1 &raquo;</TD></TR><TR><TD CLASS="quote">the whistle is air traveling through. very noticable when there's an aftermarket air filter. totally normal. that screw they are refering to is for idle adjustment. if you idle is fine DON'T PLAY WITH IT! </TD></TR></TABLE>

^^

I have an intake and it makes the same noise. Just about any intake makes this noise. Depending on where it is placed will tell whether or not you can hear this. I've noticed that with a CA intake, with the fender liner gone and the passenger window down, driving next to a wall, is when it is loudest.

Turn the radio up or go back to stock.

 

I had the same problem but it went away when i switched intakes

Its not a big deal, but its freakin annoying

 

haha yeah its so annoying...

did you switch back to stock or to just a different aftermarket?

 

https://honda-tech.com/zerothread?id=1365732

For me I barely heard it after I installed my IM, but after I got it all tuned, it started happening.

Theres many different theories. Call me a ricer, but I like it LOL

 

and b20 ej6, idk if we're talking about the same thing because i dont need the fender liner gone or have the windows down...its really loud both inside and outside the car. This guy on the freeway was afraid to run me cuz he thought i was turboed haha thats how loud it is

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kevin7kevin7 &raquo;</TD></TR><TR><TD CLASS="quote">haha yeah its so annoying...

did you switch back to stock or to just a different aftermarket?</TD></TR></TABLE>

I switched to another aftermarket. But to tell you the truth, it all started when someone started messing with my throttlebody cable by loosening the screw. After that its been doing it. It never did it before that.

 

It's probably air rushing past the FITV hole. Nothing you can do about it without making changes to the body of the TB.