Whine/Noise/High Pitch Arg!

prodigyz · 04-30-2009, 07:33 PM

This noise was pointed out by my wife a few weeks back and I can no longer stand it. I found a thread here about it but it died out. Should I take it back to the dealer or what.

The noise is VERY high pitched. Happens on acceleration/ going above 10mph. When in idle i hear nothing. ONLY 10mph or higher and its like a whine. Feels all around me cant tell where it is coming from. Full acceleration seems to drown it out or if i have music moderately loud.

NisMoDo · 04-30-2009, 08:59 PM

did u get an aftermarket sound system installed?

spearfish25 · 04-30-2009, 09:08 PM

Are you referring to the electronic whine sound? You're right, there was another thread about this. People traced it all over the place...some thought it was the fuel pump, others from elsewhere in the dash or engine bay. There are times I notice it and times I don't hear it at all. Lately I've heard it while sitting at idle mainly.

At this point, I'd say it's not something faulty in the car as it seems to be present for many people. The true source still eludes us though.

NisMoDo · 04-30-2009, 09:45 PM

yea i was referring to that sound. If it only occurs during acceleration usually its sumthing to do with a bad ground wire connection. If that indeed is the problem re-ground the wire & check your connections and that menacing sound should be gone.

prodigyz · 04-30-2009, 09:53 PM

I have done nothing to the car so guess I will take it in. Def sounds like an electrical sound.

antennahead · 04-30-2009, 11:03 PM

It's coming from under the engine cover, not sure what is making it. When you turn your car off it continues for a few seconds then dies off. G37s have the same issue.

John

TheWeatherman · 05-18-2009, 10:43 AM

Quote:

Originally Posted by antennahead

It's coming from under the engine cover, not sure what is making it. When you turn your car off it continues for a few seconds then dies off. G37s have the same issue.

John

Sounds like the fuel pump to me. You can tell because when you dog it a bit, and the electrical system is strained, it temporarily lowers in pitch. I've heard fuel pumps in a lot of my cars I've owned, and it sounds almost exactly the same as all of the others. My vote... Fuel pump. Other noises... a bit of interference coming through the stereo system. I've also heard this in other cars that I've owned.

antennahead · 05-18-2009, 06:34 PM

Quote:

Originally Posted by TheWeatherman

Sounds like the fuel pump to me. You can tell because when you dog it a bit, and the electrical system is strained, it temporarily lowers in pitch. I've heard fuel pumps in a lot of my cars I've owned, and it sounds almost exactly the same as all of the others. My vote... Fuel pump. Other noises... a bit of interference coming through the stereo system. I've also heard this in other cars that I've owned.

Fuel pump sounds logical.

Phimosis · 07-15-2009, 06:01 PM

I have a similar, completely annoying situation, but my description is different. Let's see if this jives with what others are hearing.

The sound is a high pitch, but not a squeal... Mire like a human voice humming at high pitch. It's not a stereo ground loop, because it's not coming from the speakers. It sounds like it's coming from the engine compartment, left side, maybe around the brake booster. At idle, the sound completely goes away. Above 2500 rpm I can't hear it either, maybe because the engine is making exhaust noise plus the thrashing about from the vvel. The sound is most prominent from 1000-2000 rpm under light load or no load. Driving slowly it's the worst. Once stopped, if you blip the throttle from idle to 2000 rpm you can hear it, but that only lasts for about 30 seconds. I tried trouble shooting it and prolonged idle time made it go away, despite blipping the throttle multiple times.

I thought it might be a vacuum leak, so after letting my car cool down, I thoroughly checked all the rubber hoses and everything seems to be fine. Could it be a vacuum diaphragm humming and that is it's normal functioning state?

I took my car to the dealer before I saw this thread and described what I was hearing. They looked at my car and said nothing was wrong with it.

Phimosis · 08-13-2009, 08:39 AM

^bump

onefastz · 10-06-2009, 02:00 PM

I took my 370z into the dealer today because of it, and only one person could hear it, besides me. The one guy there that could hear it drove the other Z's on the lot, and could also hear it in them too, but he did mention that it was more clear with Z's with navigation, so maybe it has to do with that? I'm not sure but he said until the manufacturer issues a problem with it, they cannot find out what it is. It's driving me crazy!

havasuwiley · 10-06-2009, 10:02 PM

my dealership said its the ecu,no fix yet

SiXK · 10-07-2009, 08:09 AM

My car has the high pitch whine also, and it did not start until approx. 9500 miles.

kdo2milger · 10-07-2009, 08:12 AM

at first glance i saw white noise in the title

nm...

cpehaot · 10-07-2009, 12:34 PM

If the fuel pump is the suspect, u can check that by turning your car "ON" (not start) the fuel pump should run for a little bit then stop. You can hear if it's the same noise. The bearing on your vent fan can make some small high pitch noise too so make sure u have it/them off.

04-30-2009, 07:33 PM	#1 (permalink)
prodigyz Base Member Join Date: Apr 2009 Location: san diego Posts: 13 Drives: 09 nissan 370z at7 Rep Power: 17	Whine/Noise/High Pitch Arg! This noise was pointed out by my wife a few weeks back and I can no longer stand it. I found a thread here about it but it died out. Should I take it back to the dealer or what. The noise is VERY high pitched. Happens on acceleration/ going above 10mph. When in idle i hear nothing. ONLY 10mph or higher and its like a whine. Feels all around me cant tell where it is coming from. Full acceleration seems to drown it out or if i have music moderately loud.

10-07-2009, 08:09 AM	#13 (permalink)
SiXK Enthusiast Member Join Date: Jan 2009 Location: Orlando Posts: 352 Drives: 09 370Z / 91 300ZXTT Rep Power: 186	My car has the high pitch whine also, and it did not start until approx. 9500 miles. __________________ Magnetic Black 2009 370Z / Pearl Yellow 1991 300ZXTT

10-07-2009, 08:12 AM	#14 (permalink)
kdo2milger OG Priesthood Join Date: Feb 2009 Location: Fargo, ND Posts: 17,859 Drives: NISMO T Rep Power: 60	at first glance i saw white noise in the title nm... __________________ Project *NISMO* Last edited by kdo2milger; 10-07-2009 at 12:45 PM.

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04-30-2009, 08:59 PM	#2 (permalink)
NisMoDo Base Member Join Date: Apr 2009 Location: de Posts: 34 Drives: no Z for me :( Rep Power: 17	did u get an aftermarket sound system installed?

04-30-2009, 09:08 PM	#3 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	Are you referring to the electronic whine sound? You're right, there was another thread about this. People traced it all over the place...some thought it was the fuel pump, others from elsewhere in the dash or engine bay. There are times I notice it and times I don't hear it at all. Lately I've heard it while sitting at idle mainly. At this point, I'd say it's not something faulty in the car as it seems to be present for many people. The true source still eludes us though.

04-30-2009, 09:45 PM	#4 (permalink)
NisMoDo Base Member Join Date: Apr 2009 Location: de Posts: 34 Drives: no Z for me :( Rep Power: 17	yea i was referring to that sound. If it only occurs during acceleration usually its sumthing to do with a bad ground wire connection. If that indeed is the problem re-ground the wire & check your connections and that menacing sound should be gone.

04-30-2009, 09:53 PM	#5 (permalink)
prodigyz Base Member Join Date: Apr 2009 Location: san diego Posts: 13 Drives: 09 nissan 370z at7 Rep Power: 17	I have done nothing to the car so guess I will take it in. Def sounds like an electrical sound.

04-30-2009, 11:03 PM	#6 (permalink)
antennahead A True Z Fanatic Join Date: Mar 2009 Location: Charleston, SC Posts: 15,181 Drives: '07 Z4 "M" Roadster Rep Power: 58	It's coming from under the engine cover, not sure what is making it. When you turn your car off it continues for a few seconds then dies off. G37s have the same issue. John

07-15-2009, 06:01 PM	#9 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 417	I have a similar, completely annoying situation, but my description is different. Let's see if this jives with what others are hearing. The sound is a high pitch, but not a squeal... Mire like a human voice humming at high pitch. It's not a stereo ground loop, because it's not coming from the speakers. It sounds like it's coming from the engine compartment, left side, maybe around the brake booster. At idle, the sound completely goes away. Above 2500 rpm I can't hear it either, maybe because the engine is making exhaust noise plus the thrashing about from the vvel. The sound is most prominent from 1000-2000 rpm under light load or no load. Driving slowly it's the worst. Once stopped, if you blip the throttle from idle to 2000 rpm you can hear it, but that only lasts for about 30 seconds. I tried trouble shooting it and prolonged idle time made it go away, despite blipping the throttle multiple times. I thought it might be a vacuum leak, so after letting my car cool down, I thoroughly checked all the rubber hoses and everything seems to be fine. Could it be a vacuum diaphragm humming and that is it's normal functioning state? I took my car to the dealer before I saw this thread and described what I was hearing. They looked at my car and said nothing was wrong with it.

08-13-2009, 08:39 AM	#10 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 417	^bump

10-06-2009, 02:00 PM	#11 (permalink)
onefastz Base Member Join Date: Aug 2009 Location: Chattanooga Posts: 187 Drives: 09 Nissan 370z MB Rep Power: 16	I took my 370z into the dealer today because of it, and only one person could hear it, besides me. The one guy there that could hear it drove the other Z's on the lot, and could also hear it in them too, but he did mention that it was more clear with Z's with navigation, so maybe it has to do with that? I'm not sure but he said until the manufacturer issues a problem with it, they cannot find out what it is. It's driving me crazy!

10-06-2009, 10:02 PM	#12 (permalink)
havasuwiley Base Member Join Date: Jul 2009 Location: lake havasu city az Posts: 131 Drives: 09 370z, 03 z06 etc Rep Power: 16	my dealership said its the ecu,no fix yet

10-07-2009, 12:34 PM	#15 (permalink)
cpehaot Base Member Join Date: Aug 2009 Location: California Posts: 46 Drives: Black STD Z370 Tour Rep Power: 16	If the fuel pump is the suspect, u can check that by turning your car "ON" (not start) the fuel pump should run for a little bit then stop. You can hear if it's the same noise. The bearing on your vent fan can make some small high pitch noise too so make sure u have it/them off.