I sure hope that some of those diehard Miata mechanics can help me. Today I
was driving my 1990 Miata down the road, depressed the clutch and felt
something hit my foot. Further investigation indicated that this was a green
disc (or rather the remaining pieces of a green disc). Also I notice that
when I barely begin pushing in the clutch petal I heard a click and just as
I released the pedal I heard the same single click again.

Laying upside down with a drop light I noticed that there are two sensors
for the clutch pedal. There is of course the safety sensor when the clutch
is fully depressed, which requires the clutch pedal to be fully depressed
which allows the engine to start. The one I am interested in is the sensor
located at the top (closest to the driver) which appears to engage somewhat
when the clutch pedal is fully released. What I found unusal about this
sensor is the clicking sound was occurring when the tip of the retractable
sensor was lining up with a hole on the pedal when it's fully released. I'm
wondering if the green disc was suppossed attach via the hole and depress
this sensor.

I did some quick research and I can not determine what this sensor is for. I
am guessing that the plastic disc is suppossed to depress the tip of the
sensor, otherwise the sensor seems to serve no purpose. Nor can I find a
part to order to replace the broken part. Any help that could be give to
help me get this resolved would be appreciated and any direction that could
be given to locating a replacement part (with or without a part number).

Thanks in advance for your help!

Signed -- David (Birmingham, Alabama)