Not sure if it's always been like this, but I've noticed recently there is a whine or whistle when accelerating and decelerating. Not sure where it's coming from, but the noise kind of 'syncs' with the engine speed. In other words, the more RPM's, the more pronounced the whistle is. Could it be the alternator, or even the grounding kit? I'm not getting noise or static through the speakers though. It seems more mechanical.

2004 G35C 6MT DG/G | Premium | Alum Pedals |Huper Optik 30/40/50 | Z-Tube | K&N Drop-In | Grounding Kit

 

Could be a number of things such as an intake whistle, or a gear whine, a serpentine belt misalignment,.
Unless it gets louder, I wouldn't worry about it.

<font color=red>GSM</font color=red>
<font color=red>GSM</font color=red>
<font color=black>Silverstone Coupe</font color=black>

 

z-tube, I have the same thing happening too.. I don't know exactly what it is..

 

I have the stock intake and I hear it also.
When I took it to the dealer, they just said they didn't hear anything. F@%!ers

2003 G35 Coupe 6MT/Black/Graphite/15% tint/6 wire GroundingGear™

 

Your hampsters must be getting tired...

no,... just messing, i have the same problem to sometimes but it's not constant...

 

I get a whining noise everyday when the car is cold. Seems to be the same issue. It goes away when warm, but I also would like to know what it is.

Eric
04, 6MT

 

you sure you don't have a supercharger? hehehe j/k

 

Hey i have int injen intake and it makes a huge whistling sound too. People think i have a turbo its really funny. Its real loud too. My buddy says he can he it from inside of his car while we are driving next to eachother.

It nothing big man dont worry about it. Most likely its from your intake.

2004 Diamond Graphite G35 Coupe 6MT, Premium Package, Aero Package, DVD Nav

2003 Brilliant Silver G35 Sedan Premium Package, Aero Package, DVD Nav