'90 80Q, strange noise (chipmunks??)

[ed armstrong]

Theres two knock sensors on this car. The other one is
bolted to the top of the head next to the distributor
I believe.


 -ed


--- Huw Powell <human747 at attbi.com> wrote:
>
> > I have a 1990 80Q with 120K on it. Lately it has
> started to make a
> > (chirping, ringing, pinging, chikmunks in a
> blender) kind of noise. It
> > will only do it under load and only after it's
> warmed-up. It almost
> > sounds like the exhaust rattling but everything
> seems tight. I'm just
> > looking for any ideas on what it might be? Anyone
> been here before and
> > figured it out?
>
> Is is a "coffe can full of nuts and bolts" rattle
> from the engine?
>
> Does it seem a little "off" on power when it
> happens?
>
> Perhaps your knock sensor has gone bad, and you are
> hearing what it
> normally prevents by retarding the timing.
>
> This happened to me, under conditions where I used
> to see a weird "loss"
> of power, one day instead I got the coffe can full
> of (stainless)
> hardware sound.  Swapped knock sensor, it went away.
>
> Unfortunately, other than saying "swap in a known
> good one" I can't
> offer an effective diagnostic for this.
>
> The knock sensor is bolted to the block, down low in
> front of the
> driver's side engine mount area.  just below the
> heater coolant pipe.
>
> --
> Huw Powell
>
> http://www.humanspeakers.com/
>
> http://www.humanthoughts.org/


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