whining belt sounding noise at highway speed

harordr · 02-23-2014, 09:26 PM

Hey guys i'm looking for some help....my Z is out of warranty and im at 31k miles. At lower speeds (<50ish mph) my Z sounds normal, as in good exhaust noise and motor noise. Once I start to speed up and I am on the highway, i'm getting like a belt whining noise and its to the point where if i'm in 6th gear and give it just a little gas or even if i downshift to 5th to speed up a bit, I dont even hear the exhaust or motor, all I hear is a whining noise and it sounds terrible. Whats weird is that if I go through a puddle it seems to get worse...could this be a really bad wheel bearing issue or does it sound like possibly and intake problem?? Like i said im out of warranty and the dealership wants $120/hr

Any help is greatly appreciated!!

DEpointfive0 · 02-24-2014, 02:51 AM

I believe it is ECU whine, not a belt

Elan · 02-24-2014, 03:18 AM

Have you checked your supercharger?

SouthArk370Z · 02-24-2014, 06:11 AM

Take a passenger along for a ride and see if they can pinpoint the source.

As per DE.50, it could be the ECU (right side footwell). Could be the tires. I doubt it is a wheel bearing - they tend to have a "gritty" rumble/growl instead of a whine.

Edit: could also be the fuel pump.

osbornsm · 02-24-2014, 09:17 AM

Are you driving in ... reverse?

harordr · 02-24-2014, 11:06 AM

i just did some research into what the ecu would sound like and from what I understand is that it would be a high pitched frequency noise. Mine is not like that. When i touch the gas or when i have cruise control on I dont hear exhaust or anything, I just hear like a belt noise.

Mt Tam I am · 02-24-2014, 11:30 AM

Can the belt , fan be moved by hand without tools?

Mitco39 · 02-24-2014, 11:37 AM

Is it related to engine speed then? if so then that rules out everything like wheel bearings and tires.

If you are not moving and you rev up the engine do you hear the same sound?

harordr · 02-24-2014, 11:42 AM

no its only when im moving and at higher speeds >50 mph. the noise drowns out all other noises and just whines. It started this winter so I didnt know if the car just doesnt like cold weather or what but it sounds bad.

kenchan · 02-24-2014, 11:47 AM

you call DE?

SouthArk370Z · 02-24-2014, 11:48 AM

Could be a lot of things, including trans or diff. You need to pinpoint the location of the noise.

kenchan · 02-24-2014, 11:50 AM

Quote:

Originally Posted by Mitco39

Is it related to engine speed then? if so then that rules out everything like wheel bearings and tires.

If you are not moving and you rev up the engine do you hear the same sound?

probably not engine related... might be tranny related, but not sure if op tried going up to 7k rpm in 1st. that'll net you sub-50mph noise.

no noise, then probably wheel bearings or something.

kenchan · 02-24-2014, 11:51 AM

something like over excited squirrels residing inside intake...

.. or a/c inlet vent area..

kenchan · 02-24-2014, 11:51 AM

find acorns on your cabin filter?

Mitco39 · 02-24-2014, 12:07 PM

Does your car have a 3M bra on the front of it?

What about if you pop the car into neutral while moving and let the engine rpms go to idle, is the noise still there?

02-23-2014, 09:26 PM	#1 (permalink)
harordr Base Member Join Date: Sep 2013 Location: detroit Posts: 42 Drives: '09 370Z Rep Power: 12	whining belt sounding noise at highway speed Hey guys i'm looking for some help....my Z is out of warranty and im at 31k miles. At lower speeds (<50ish mph) my Z sounds normal, as in good exhaust noise and motor noise. Once I start to speed up and I am on the highway, i'm getting like a belt whining noise and its to the point where if i'm in 6th gear and give it just a little gas or even if i downshift to 5th to speed up a bit, I dont even hear the exhaust or motor, all I hear is a whining noise and it sounds terrible. Whats weird is that if I go through a puddle it seems to get worse...could this be a really bad wheel bearing issue or does it sound like possibly and intake problem?? Like i said im out of warranty and the dealership wants $120/hr Any help is greatly appreciated!!

02-24-2014, 02:51 AM	#2 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	I believe it is ECU whine, not a belt __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

02-24-2014, 03:18 AM	#3 (permalink)
Elan Track Member Join Date: May 2013 Location: Alpharetta, GA Posts: 906 Drives: Airplanes Rep Power: 16	Have you checked your supercharger? fuct and Haboob like this. __________________ 2009 370Z NISMO #477 \| AAM Competition Short Tails \| AAM Competition HFCs \| K&N Typhoon CAI \| Kenwood DPX300U \| Rockford Fosgate PRIME R300-4 \| Rockford Fosgate Punch P165 \| Rockford Fosgate Punch P300-12 \| Polk Audio db1001 \| 15% Tints \| GTR Start Button \|

02-24-2014, 06:11 AM	#4 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Take a passenger along for a ride and see if they can pinpoint the source. As per DE.50, it could be the ECU (right side footwell). Could be the tires. I doubt it is a wheel bearing - they tend to have a "gritty" rumble/growl instead of a whine. Edit: could also be the fuel pump. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma Last edited by SouthArk370Z; 02-24-2014 at 09:26 AM.

02-24-2014, 09:17 AM	#5 (permalink)
osbornsm A True Z Fanatic Join Date: Jun 2011 Location: WHAT Posts: 2,551 Drives: 2018 Camaro SS 1LE Rep Power: 424	Are you driving in ... reverse? __________________ 2018 Camaro SS 1LE (455hp) - 2011 Nissan 370z (333hp) - 2004 VW R32 (240hp) - 2000 Civic Si (160hp)

02-24-2014, 11:06 AM	#6 (permalink)
harordr Base Member Join Date: Sep 2013 Location: detroit Posts: 42 Drives: '09 370Z Rep Power: 12	i just did some research into what the ecu would sound like and from what I understand is that it would be a high pitched frequency noise. Mine is not like that. When i touch the gas or when i have cruise control on I dont hear exhaust or anything, I just hear like a belt noise.

02-24-2014, 11:30 AM	#7 (permalink)
Mt Tam I am A True Z Fanatic Join Date: Jun 2010 Location: California Posts: 10,709 Drives: 370Z T/S/N 6MT & XKE Rep Power: 3843	Can the belt , fan be moved by hand without tools? __________________ "Does the carpet match the drapes? NO!!! I don't date bald women." Nissan Motorsports 34R Oil Cooler. Stillen CBE. Hotchkis Sport Sway Bars. KW Variant 3 Coilover System. Stillen Gen3 CAI. Michelin Pilot Super Sport. Stillen Brake Ducts. Carbotech™ XP10/XP8 Pads. Z1 Front Rotors. Z1 Stainless Brake Lines. Two degrees of camber

02-24-2014, 11:37 AM	#8 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	Is it related to engine speed then? if so then that rules out everything like wheel bearings and tires. If you are not moving and you rev up the engine do you hear the same sound? __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

02-24-2014, 11:42 AM	#9 (permalink)
harordr Base Member Join Date: Sep 2013 Location: detroit Posts: 42 Drives: '09 370Z Rep Power: 12	no its only when im moving and at higher speeds >50 mph. the noise drowns out all other noises and just whines. It started this winter so I didnt know if the car just doesnt like cold weather or what but it sounds bad.

02-24-2014, 11:47 AM	#10 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	you call DE? Elan likes this.

02-24-2014, 11:48 AM	#11 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Could be a lot of things, including trans or diff. You need to pinpoint the location of the noise. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

02-24-2014, 11:51 AM	#13 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	something like over excited squirrels residing inside intake... .. or a/c inlet vent area..

02-24-2014, 11:51 AM	#14 (permalink)
kenchan A True Z Fanatic Join Date: Aug 2009 Location: N/A Posts: 76,801 Drives: N/A Rep Power: 141521	find acorns on your cabin filter?

02-24-2014, 12:07 PM	#15 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 132	Does your car have a 3M bra on the front of it? What about if you pop the car into neutral while moving and let the engine rpms go to idle, is the noise still there? __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

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