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My Noise Problem Identified

Originally Posted by jpit For those who have the high pitched noise coming from the engine compartment (not the ecu), the problem has been identified. The noise is coming from

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Old 11-28-2009, 11:11 AM   #1 (permalink)
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Quote:
Originally Posted by jpit View Post
For those who have the high pitched noise coming from the engine compartment (not the ecu), the problem has been identified. The noise is
coming from the throttle bodies which are electrically controlled. I disconnected the harnesses and sure enough the noise stopped (also threw a code). Took this info to Nissan and he said that some of their other cars have this problem also.
Oh thank God it looks like the problem had been identified. For a while now it had been a big mystery. It is hard to say if Nissan would fix this kind of problem. On the Warranty terms and conditions it says it doesn't cover out of place sounds, noises, vibrations, and what not. The attitude is, "If it's running fine despite the noise; then it is not covered under warranty". Kind of screwed up I know but that is just how it is with these Corporations. Considering how much money people spend on a 370Z starting at $34,000; it would be better if there weren't any of these noises that are out of place.

On a side note when I went to the Subaru test drive event near Malibu. I noticed that those cars performed flawlessly. There was not a single noise out of place at all. I wonder what had happened to Nissan.

Last edited by avitech; 11-28-2009 at 11:23 AM.
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Old 11-28-2009, 11:13 AM   #2 (permalink)
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Originally Posted by avitech View Post
Oh thank God it looks like the problem had been identified. For a while now it had been a big mystery. It is hard to say if Nissan would fix this kind of problem. On the Warranty terms and conditions it says it doesn't cover out of place sounds, noises, vibrations, and what not. The attitude is, "If it's running fine despite the noise; then it is not covered under warranty". Kind of screwed up I know but that is just how it is with these Corporations. Considering how much money people spend on a 370Z starting at $34,000; it would be better if there weren't any of these noises that are out of place.

On a side note when I went to the Subaru test drive event near Malibu. I noticed that those cars performed flawlessly. There was not a single noise of of place at all. I wonder what had happened to Nissan.
For him it has been identified, there are still two variables in the noise. The one posted in this thread and the ECU in the other thread. Noises are bound to happen, this one seems a bit overlooked, but at the same time it is now a high "failure" rate as I will put it. Not everyone has it, so all internal testing could have come back fine, plus many are only having the issue after 5,000 or 6,000 miles.
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Old 11-28-2009, 11:25 AM   #3 (permalink)
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For him it has been identified, there are still two variables in the noise. The one posted in this thread and the ECU in the other thread. Noises are bound to happen, this one seems a bit overlooked, but at the same time it is now a high "failure" rate as I will put it. Not everyone has it, so all internal testing could have come back fine, plus many are only having the issue after 5,000 or 6,000 miles.
............and the throttle body noise is minor, and cannot be heard when the engine is running and you are driving.......... the inside/ECU noise is an entirely different animal, and is hard to live with for those that have it.
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Old 11-28-2009, 11:31 AM   #4 (permalink)
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............and the throttle body noise is minor, and cannot be heard when the engine is running and you are driving.......... the inside/ECU noise is an entirely different animal, and is hard to live with for those that have it.
If it is in fact the ECU making noise. Maybe this problem can be solved by placing "dynomat" or some other sound absorbent material around the ECU to isolate the noise away from the cabin.
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Old 11-28-2009, 03:40 PM   #5 (permalink)
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I was surprised, my gf's car makes the same frequency noise; but the noise was on the rear of the car. Hers is louder though and noise won't stop. She drives vw getta '08.
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Old 11-29-2009, 01:32 AM   #6 (permalink)
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Sorry, I am new here to the 370z family, but noticed you guys have been complaining about noise coming from the car.. Was this noise identified when ya'll bought the car or does it slowly come about?
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Old 11-28-2009, 11:29 AM   #7 (permalink)
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Originally Posted by theDreamer View Post
For him it has been identified, there are still two variables in the noise. The one posted in this thread and the ECU in the other thread. Noises are bound to happen, this one seems a bit overlooked, but at the same time it is now a high "failure" rate as I will put it. Not everyone has it, so all internal testing could have come back fine, plus many are only having the issue after 5,000 or 6,000 miles.
It's hard to imagine that an ECU could make much noise at all. Unless it has an electric cooling fan, there are virtually no moving parts at all. Why should an integrated circuit flowing with a few electrons create any kind of audible noise to be heard? I can see why a Diode would make noise and in some alternators they do. I have seen relays make noise and they are mechanical and electrical. But I have never seen a computer chip make any kind of noise unless it were an electric cooling fan right next to it.

I had all kinds of cars in the past that made all kinds of different noises at different times. I never obsessed over it so long as the thing ran fine. I would just ignore the noises or cover it up with music from the stereo.
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