High Pitch Noise Hurting My Ears

370Zsteve

Guitarist here! My upper-registers are shot, mebbe this is a non-issue for me, lol. My passengers are on their own .

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SOLD MY Z MARCH 2018 - another Core OG moves on - new ride 2019 Z Corvette Grand Sport - no mods necessary but already have eyes on HFC and intakes LOL IT NEVER ENDS.

xiven

I hear it but it doesn't bother me. I haven't had any fuel related problems with my car, but I do know that the noise must be coming from the fuel pump. I guess for some reason they couldn't make a quiet one. I hear it especially when I turn my car off and then it goes away after a few seconds. No one else riding w/ me has heard it so I guess mine isn't as bad as others or else I just have a higher tolerance.

SiXK

This started on my car at 8000 miles after 6 months of ownership, and it gets worse the longer it goes on.

Its not the fuel pump or the transmission, its the ECU. Apparently the G37 has the problem too and Nissan/Infiniity does not seem very motivated to fix the issue.

There have been several threads on the subject on this board, search "high pitch" and you will find them. heres one:

High pitch noise coming from passenger side

If you turn your head to the left to look out the mirror, you hear it in your right ear. The noise is easily heard over AM talk radio, but most FM will drown it out. However if you listen to AM or if you turn the radio off you will hear the noise for an hour or two after leaving the car.

I am taking my car to the dealer next week and demanding they fix it, if they don't I am going to a lemon law attorney. My main problem with it is 1) it shouldn't be happening and 2) its getting worse.

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Magnetic Black 2009 370Z / Pearl Yellow 1991 300ZXTT

natenyc123

WOW...I'm going to actually get a hearing test done..if there is damage (using my previous test as a baseline) I know I have a case.

xiven

whats the manufacture date on yours?

nicknick

I hope you're joking. If you're not joking then it is people like you that have given America a "mad litigation label".

natenyc123

of course i'm joking

Mark5092

I have 1800 miles on my car and no noises or rattles.

TheWeatherman

YES YES YES!! Tiger is right! His technique is exactly right! You can really hear it especially loudly when you look left. Your ears do ring for quite awhile when getting out of the car. That can't be good. I love this car except for that problem. I have an '09 Infiniti FX35 that doesn't make that noise. I bought my car in Feb. I don't feel like walking outside to check my exact build date. I would think it was buit in late Fall of '08.

JungleB

No one has mentioned the HID lights ballast. The Xenon lights are High Intensity Discharge lights which require a high voltage, which is created by a ballast. Modern day ballasts are electronic (sometimes also referred to as digital) and can operate at frequencies in the 10s of kilohertz range. From the research I've done it looks like most vehicle HID ballasts operate in the 450hz range, which is more along the lines of bass than a high pitched sound, however, if the ballast does in fact operate at a higher frequency and there's a grounding issue the noise could possible show up in a variety of places. The most likely would be speakers.

While the fuel pump is a likely problem, I'm not sure it would create a resonance frequency of around 20khz, the frequency where human hearing cutoffs and appears to be the sound that people are hearing.

If the ECU is also operating at a frequency in the same range it could also create the problem if there's a grounding problem, it's just that ECU's operate at a low voltage and I would think it's too small to create the issue at hand.

This is all speculation and guesses, but figured I'd throw it out there.

SiXK

after spending some time reading about it here and on various G37 sites, I don't think there's any question its the ECU. On some Infinity sites it said the dealers tried to fix it by wrapping the ECU in sound deadening material, but did not do it too much so that it would overheat. Results were so-so. On threads on this site some posters have had the dealers diagnose it as the ECU. Its the ECU.

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Magnetic Black 2009 370Z / Pearl Yellow 1991 300ZXTT

kannibul

Simple solution, take out the ECU and see if it goes away

Rapidshutter

Hi-
Thanks for the info.
I have a 2009 EX35 JOURNEY AWD with full electronics/nav/Bose package.
Just yesterday the high pitch whining began on my ride home from work. I have excellent hearing so it is extremely distracting and irritating.
I immediately hit the Net and found a boat load of posts. It seems that you nailed the fix.
I of course called my dealer - Infiniti of Englewood - and needless to say the service manager "never" heard of this issue.
I called the finance manager whom I have a good rapport with and simply insisted that they order an ECU replacement. Overall, I am mostly pleased with the car but it clearly has some blatant shortcomings such as poor gas mileage (which I kind of expected) and poor seat warmers. The back hatch should be automatic too.
If the FX35 was more in the ballpark for me - I would have just bought that instead.
I did not expect a perfect product but 1700 miles is a bit on the early side to begin the process of working out the annoying bugs and ticks.[/B]

Sarah T

I already took my Z in to get the high pitched noise from the front, now it's coming from the back of the car, another ECU problem, i am so frustrated.

Sarah T

I had the ECU replaced and it fixed the high pitched noise in the front, now it's happening again from the back of the car. I wish Nissan would be more proactive in fixing this problem. I miss too much work bringing it in and out of the dealership taking up my time fussing/proving over these things just to get it fixed. My 2009 370Z is already at 45k and my warrenty is going to run out soon.