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yeah its weird, whenever i accelerate i hear it, between 2 and 3 rpm its the loudest, its sorta like this high pitched hissing sound, but when my car warms up, the temperature reaching the middle, the sound goes away....

 
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its a vtec thig

 
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its a vtec thing

 
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hmm...interesting

 
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i wish it was a vtec thing, i have the 115 hp sedan, not going to bother with lx, ex labeling since i'm in canada and the model names are different.

 
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if you have a SRI or CAI its that

 
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double post, my bad

 
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I have cai, yeah i didn't want to first mention that i had cai, cause i know ppl would say that automatically, hmm cai makes that sound? is it because air is escaping somwhere in my intake?

 
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triple post my bad

 
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Its normal....you can hear it with a stock intake too....... but with a CAI you can really hear it.

Mike

 
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I have an lx and my car always makes this high pitch sound wether its cold or hot. It also does it around 2,000 - 3,000 rpm, but when I floor it, my engine sounds like a beast for a lil 4 banger and I'm still running stock. Its wierd though, because when I meet up with other 2k1s', there cars don't make that noise, maybe my car is a outcast or something.[IMG]i/expressions/face-icon-small-confused.gif[/IMG]

 
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My car makes the same noise when I start it and drive it for the first minute or so at low RPM's. It is definately because of my SRI. Nothing to worry about, just a little more air flowing through.

 
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Yeh, that's just the sound of your engine breathing in, nice and deep [IMG]i/expressions/face-icon-small-smile.gif[/IMG]

If when you turn your car off, you hear a hiss as it shuts down, the intake is on the way it needs to be and is
working fine !!

 
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ok thanks everyone, thought there was a hole in my car or something

 
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Just so ya'll know, VTEC doesn't engage until the engine is properly warmed up.

 
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no vtec on my car

 
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My 02 EX make the same whine. It's definitely not VTEC gents. PerfectD3 is right, plus VTEC doesn't engage until higher in the powerband. I believe the sound comes from the Throttle Body on the intake manifold (see image).

Xjet