High-Pitched Frequency Update

Silver37 · 11-17-2009, 05:42 AM

Z owners...FYI...some of the guys on the G37 forum are making progress on the aggravating high-pitched frequency coming from our G37s. They have recorded and isolated the frequency to be ~10mHz and have graphs and soundbites to prove it. You may be able to duplicate the test on your Zs and help us take to Nissan and Infiniti to get their attention on solving the problem once and for all.

Matt · 11-17-2009, 05:43 AM

Perhaps a search can pull it up, but there's a thread on these forums that discusses someone's trip to the dealership about this, and I believe they figured out what was causing it.

EDIT:

Here it is: Bulletin just posted - ecu noise replacement - nice work members!!!!

SiXK · 11-17-2009, 08:26 AM

Quote:

Originally Posted by Silver37

Z owners...FYI...some of the guys on the G37 forum are making progress on the aggravating high-pitched frequency coming from our G37s. They have recorded and isolated the frequency to be ~10mHz and have graphs and soundbites to prove it. You may be able to duplicate the test on your Zs and help us take to Nissan and Infiniti to get their attention on solving the problem once and for all.

thanks for the post... very interesting. Do you have a link to the G37 thread about this? I would like to read it. Thanks again!

kannibul · 11-17-2009, 08:34 AM

Quote:

Originally Posted by Silver37

Z owners...FYI...some of the guys on the G37 forum are making progress on the aggravating high-pitched frequency coming from our G37s. They have recorded and isolated the frequency to be ~10mHz and have graphs and soundbites to prove it. You may be able to duplicate the test on your Zs and help us take to Nissan and Infiniti to get their attention on solving the problem once and for all.

10MHz is well out of human hearing range. 10KHz, well that might be worth noting.

Lug · 11-17-2009, 08:36 AM

Quote:

Originally Posted by kannibul

10MHz is well out of human hearing range. 10KHz, well that might be worth noting.

This

j.arnaldo · 11-17-2009, 09:10 AM

Weird stuff.

speedoflife · 11-17-2009, 09:20 AM

Quote:

Originally Posted by Lug

This

x3

vipor · 11-17-2009, 10:11 AM

i'd estimate that it's in the 10k+ freq range. i hear it when i'm touching the gas pedal. it's like it's the fuel pump trigger wire from the BCM or somethin iono. minor, but i'd still like it to go away.

Matt · 11-17-2009, 10:15 AM

Quote:

Originally Posted by vipor

i'd estimate that it's in the 10k+ freq range. i hear it when i'm touching the gas pedal. it's like it's the fuel pump trigger wire from the BCM or somethin iono. minor, but i'd still like it to go away.

My hearing is so poor, I'd need subtitles to hear any high pitch noise from the engine!

vipor · 11-17-2009, 10:23 AM

Quote:

Originally Posted by Matt

My hearing is so poor, I'd need subtitles to hear any high pitch noise from the engine!

JungleB · 11-17-2009, 10:44 AM

Quote:

Originally Posted by kannibul

10MHz is well out of human hearing range. 10KHz, well that might be worth noting.

I thought it would be a higher frequency, but I just listened to 10khz and it's an exact match.

Here's a sample:
The play button is hard to find, but it's right above the yellow box.
freesound :: view sample :: TONE 10 kHz 44.1 16bit.wav

This stuff hurts my ears.

TheWeatherman · 11-17-2009, 11:11 AM

Quote:

Originally Posted by JungleB

I thought it would be a higher frequency, but I just listened to 10khz and it's an exact match.

Here's a sample:
The play button is hard to find, but it's right above the yellow box.
freesound :: view sample :: TONE 10 kHz 44.1 16bit.wav

This stuff hurts my ears.

That's it! That is it! Good job, G37 crew.

And Jungle, thanks for posting that. I feel like I'm driving my Z... at my computer!

kannibul · 11-17-2009, 11:17 AM

Quote:

Originally Posted by JungleB

I thought it would be a higher frequency, but I just listened to 10khz and it's an exact match.

Here's a sample:
The play button is hard to find, but it's right above the yellow box.
freesound :: view sample :: TONE 10 kHz 44.1 16bit.wav

This stuff hurts my ears.

If that's the case, mine doesn't have it (that, or I just can't hear it in the car). Mine was assembled March 2009.

Might be helpful to Nissan to know if it was a run of bad parts.

zrider · 11-17-2009, 12:26 PM

I just got back from the dealership today complaining about the problem. the service guys told me at first it was the electric motor for the fuel pump? and he said that all the cars have it and its normal, but he then called nissan to make sure and they told him that the sound i was hearing was coming from the ecm and it was a problem that since september they are now aware of. they also said that the 2010 model 370z's will not have that problem and that they will be posting a bulletin and or/ issuing a recall to fix this problem. I can't really prove this stuff to you guys since it was just a verbal conversation with the head service guy. hope this helps~!

kannibul · 11-17-2009, 12:32 PM

Quote:

Originally Posted by zrider

I just got back from the dealership today complaining about the problem. the service guys told me at first it was the electric motor for the fuel pump? and he said that all the cars have it and its normal, but he then called nissan to make sure and they told him that the sound i was hearing was coming from the ecm and it was a problem that since september they are now aware of. they also said that the 2010 model 370z's will not have that problem and that they will be posting a bulletin and or/ issuing a recall to fix this problem. I can't really prove this stuff to you guys since it was just a verbal conversation with the head service guy. hope this helps~!

4 posts, just joined, and a similar thread just got locked...

11-17-2009, 05:42 AM	#1 (permalink)
Silver37 Base Member Join Date: Nov 2009 Location: US Posts: 21 Drives: G37S, Nissan Maxima Rep Power: 15	High-Pitched Frequency Update Z owners...FYI...some of the guys on the G37 forum are making progress on the aggravating high-pitched frequency coming from our G37s. They have recorded and isolated the frequency to be ~10mHz and have graphs and soundbites to prove it. You may be able to duplicate the test on your Zs and help us take to Nissan and Infiniti to get their attention on solving the problem once and for all.

11-17-2009, 05:43 AM	#2 (permalink)
Matt A True Z Fanatic Join Date: Oct 2009 Location: Augusta, GA Age: 41 Posts: 1,680 Drives: 2010 Avalanche LT Rep Power: 18	Perhaps a search can pull it up, but there's a thread on these forums that discusses someone's trip to the dealership about this, and I believe they figured out what was causing it. EDIT: Here it is: Bulletin just posted - ecu noise replacement - nice work members!!!! __________________ "Any man who can drive a 370z while kissing a pretty girl is simply not giving the Z the attention it deserves." Albert Einstein....modified.

11-17-2009, 10:11 AM	#8 (permalink)
vipor A True Z Fanatic Join Date: Aug 2009 Location: Euless, TX [ DFW ] Age: 41 Posts: 13,531 Drives: Nismo 09-0183 QAB Rep Power: 48	i'd estimate that it's in the 10k+ freq range. i hear it when i'm touching the gas pedal. it's like it's the fuel pump trigger wire from the BCM or somethin iono. minor, but i'd still like it to go away. __________________ 2009 NISMO # 0193 \| QAB \| Albums! \| 05.04.10 (Dynojet) 291.94hp/248.28tq Oil Cooler (DIY) \| Custom Headlights \| GTSPEC Braces \| F.I. Long Tube Headers

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11-17-2009, 09:10 AM	#6 (permalink)
j.arnaldo Banned Join Date: Oct 2009 Location: Puerto Rico Posts: 937 Drives: Nissan 350Z, 2004 Rep Power: 0	Weird stuff.

11-17-2009, 12:26 PM	#14 (permalink)
zrider Base Member Join Date: Oct 2009 Location: Alexandria, VA Posts: 175 Drives: 2009 370z Black M/T Rep Power: 15	I just got back from the dealership today complaining about the problem. the service guys told me at first it was the electric motor for the fuel pump? and he said that all the cars have it and its normal, but he then called nissan to make sure and they told him that the sound i was hearing was coming from the ecm and it was a problem that since september they are now aware of. they also said that the 2010 model 370z's will not have that problem and that they will be posting a bulletin and or/ issuing a recall to fix this problem. I can't really prove this stuff to you guys since it was just a verbal conversation with the head service guy. hope this helps~!