Whistling under the hood...
#1
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I know what you are all thinking, but trust me, this is not that thread. ![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
About three weeks ago I started hearing a whistle/suction noise from under the hood while driving over 4k RPM, especially under acceleration. Now I do NOT have an Intake -- the only thing I have in that area would be a K&N drop-in. However when I installed it, this noise was non-existant -- this came later.
I got a spacer put in two weeks ago, but this noise was evident before the spacer. A G35C racing next to me @ Englishtown heard it as well (while in his car, full throttle, windows shut). When the spacer was installed I requested that they check all hoses -- no cracks or lose fittings he said.
So, what else could it be?
![Smilie](https://my350z.com/forum/images/smilies/smile.gif)
About three weeks ago I started hearing a whistle/suction noise from under the hood while driving over 4k RPM, especially under acceleration. Now I do NOT have an Intake -- the only thing I have in that area would be a K&N drop-in. However when I installed it, this noise was non-existant -- this came later.
I got a spacer put in two weeks ago, but this noise was evident before the spacer. A G35C racing next to me @ Englishtown heard it as well (while in his car, full throttle, windows shut). When the spacer was installed I requested that they check all hoses -- no cracks or lose fittings he said.
So, what else could it be?
#2
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just say its a turbo :P
nah seriously i dunno
its obviously around the intake or otherwise it would whistle all the time
look around the tube or re seat the filter an give it a go
nah seriously i dunno
its obviously around the intake or otherwise it would whistle all the time
look around the tube or re seat the filter an give it a go
#4
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Lol I wish I had an unknow supercharger. But then I would hope I run better than I did, and put down more than ~ 250whp
.
By all the time do you mean throughout the powerband? If so, that makes sense to me. However, I wouldn't think a drop-in would have much of an effect on sound. That could be it, but I think I would have noticed it prior to a few weeks ago -- I have had the drop-in for sometime now.
![Wink](https://my350z.com/forum/images/smilies/wink.gif)
its obviously around the intake or otherwise it would whistle all the time
Last edited by Zmazing03; 07-23-2007 at 06:05 PM.
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#8
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I did that today at work on my break. I revved it up slowly and then quickly while leaning as forward as I could. Could not hear a thing resembling what it sounds like under load.
It could be the intake, but a drop-in making a noticeable noise? Didn't think that would be the case.
When the spacer was installed I requested that they check all hoses -- no cracks or lose fittings he said.
It could be the intake, but a drop-in making a noticeable noise? Didn't think that would be the case.
check for a possible vacuum leak
#9
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yea i would put my money on the intake
just make sure everythings tight
my injen intake whistles under load thru the entire power band
but you cant hear it sitting still
and when going up a hill from 0-60 it gets quiet loud, ied had people turn to look at my car because of it in town
just make sure everythings tight
my injen intake whistles under load thru the entire power band
but you cant hear it sitting still
and when going up a hill from 0-60 it gets quiet loud, ied had people turn to look at my car because of it in town
#11
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Something under the hood is whistling on my z too.. I don't think it's the intake as the noise comes on even when the car is stopped. It is probably a vac leak though I can't seem to locate it. I was thinking about changing to nizmo hoses anyway, though I am not sure what this will really do for performance.
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shil01
Intake Exhaust
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10-07-2003 02:26 PM