My gf has a 98 civic ex auto trans and ever since i put an intake in her car it makes a whistling noise when accelerating. Everything seems tight, but i just can't figure out why its whistling?

 

it's air turbulence.

Welcome to the world of modifying cars!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Edit: https://honda-tech.com/zeroforum?id=1


[Modified by slowmanEF, 7:35 PM 11/3/2002]

 

a possible but not realistic reason would be a supercharger
a possible reason would happen to be a bad ground in the stereo system.

 

Cold air intakes do that, dont worry bro.

 

Turbo that can cause whistling j/p CAI

 

bad ground. alternator whine.

i hadf 3 difff intakes on my car not one whjitsled

 

does alternator whine mean the alternator is bad because I just replaced mine and I still hear a strong whine when I step on the gas...

 

i believe it is more like a poorly grounded amp or other stereo compnent or not big enough wire running ther. or power wires to close to the RCA's / speaker wires

etc

 

it's the intake....

 

 

Alternator whine can be caused by a bad bearing in the alternator as well. my mom's 2000 monte carlo had the alt replaced due to alt whine. they told her the bearing was going bad.

Also, i had my high output alt go bad. I stuck my old stock one back in and it has alt wine. That is why i replaced it in the first place.

Installing a cold air intake makes the engine louder. It is very noticable at first, just turn up the stereo

 

what about a tinging sound???????????????????????????

 

just like they said, cold air intakes tend to do that

 

It's not the intake that does it, but it does provide enough air traveling over the butterfly in the throttle body to produce a whistling noise

All of my friends that have intakes said something at one time or another about the whistling from their engine bay, i did a little airflow research of my own and thats what i came up with.. The angle at which the air hits the butterfly is just enough to break into a high pitched whistle. Take off the intak and drive it around the block. The noise should stop; if it doesnt and someone else says soemthing, let them think youve got a supercharger under there or something

 

ditto

its the sound of more air resonating through a larger tube...
u'll understand if u take physics.

 

don't wories, cold air intake does that very often !!
it's like " normal "

 

hey people will be intimidated by her car when they hear it, they'll think shes got a turbo or a S/C.
i say leave it. J/K
where is the whine coming from? under the hood (would be the intake)
or inside the car (alternator).

 

I cured my intake / butterfly whistle by re-adjusting my idle. When you put a CAI on it changes the flow enough that your Idle changes and your EACV has to compensate. Re-adjust your Idle and it goes away, at least it did for me.

 

3rd ditto to that. If it is not consistant i would defitley check out the throttle body gasket.... old gasket will become corroded(sp)
but don't worry bro.

 

well my short ram intake and aem one dont whitsle. htey resonate at 2500 rpm if thats what you mean but that just sounds bad *** not whitsling.

 

No doubt. I noticed the same whine on my 90 Civic, took the butterfly out (I love to experiment) Voila! No more noise. Now on to the distributor noise and steam coming out the exhaust pipe. lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 8400 rpm &raquo;</TD></TR><TR><TD CLASS="quote">just like they said, cold air intakes tend to do that </TD></TR></TABLE>
mine used to, but doesnt anymore

 

My 9 month old CRV makes a whistling noise when it is doing 2500 RPM. It only makes this noise at 2500 RPM any gear but not at any other RPM. Is this normal? It has only 3500 miles on the clock.

I haven't modified my car at all except for putting in a dog guard.

 

Old *** thread

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mrspeaker &raquo;</TD></TR><TR><TD CLASS="quote">Old *** thread</TD></TR></TABLE>

And that's a good thing. It means someone actually used the search.