Miata Mailing List: November 1999, Message #883

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On 8 Nov 99, at 7:40, Fia Persson wrote:

> Hi all,
> 
> I didn't find any suitable answers in the archive so here goes:
> 
> This weekend we took a trip to the south and it was a very 
> annoying trip for me. Not because people stare when you go 
> top down in the november rain in Sweden, but because our -97 (Ninotchka) 
> has started to make a weird, high-pitched vibrating noise
> at 4000 rpm. It seems to come from behind the radio as
> the detachable radio front emphasizes the noise. The noise
> is not always there, but most of the time. And it is at almost
> exactly 4000 rpm and in both 4th and 5th gear. Please gurus,
> can you suggest anything?
......
Hmmm,

Maybe she is crying/whining because winter is getting closer, and it will be a 
long time until she gets to play with Brua again?

;-))))

Seriously: I have no good suggestion regarding the noise you describe. It is not 
there in the other gears, or have you not checked?
As a first step, I would try to reach behind the center console and check 
whether the wiring for the radio might cause the noise. I would also try all sorts 
of setting for the climate control levers to see whether it changes the noise (lots 
of actuators, cables and such behind the center console).

Werner
Sauna time tonight