Whine/Noise/High Pitch Arg!

Vaughanabe13

Is the noise always persistent or does it only happen intermittently? I'm just wondering because one night I started up the car and heard a high pitched noise (in the 09) but it was pretty faint and easily covered up by the stereo at low volume. After that night I haven't heard it since. Is it something that gets worse over time?

I'm an electrical engineer so I could probably take out the ECU and look for the bad caps or transistors that are causing the squeal, but I don't know if I want to go to that much effort if I can get it replaced under warranty...

__________________
2009 Nissan 370Z Touring, w/sport, 6MT, chicane yellow/black.

maniacdave

From my experience, the dealership will try to replace anything *but* the ECU, if they acknowledge the issue at all.

It's a bad combo: many people can't hear the sound (depending on how bad it is) + the ECU is rather expensive + Nissan doesn't have any official advisory about this + dealerships don't like to replace expensive parts just because of "some" noise.

In total, my car spent 3 weeks in the dealership so far and counting.

PS: Yes, the squeal is exactly the sound caps/transistors sometimes make. Audible spectrum FFT analysis shows one single freq @ ~9kHz. The noise starts/stops with engine on/off, simple as that. Sometimes the engine needs to get warm a bit before it starts (~10mins running). Idling/gunned not much difference.

cheshirecat

I have the issue and haven't gotten it fixed yet. '09. It happens on startup whenever you apply throttle. You can tap the throttle and get the whine. Eventually when the car warms up it's always there.

Annoying as hell. Hoping they come out with a TSB or something before my full warranty runs out. Really don't want to do the whole song and dance with the dealership to get it fixed.