In article . net>,
"Larry Gadbois" > wrote:

> It could be the classic Miata problem. The ignition wires go bad. The
> coilpack gets damaged because of the arcing inside the wires.

Another common cause of coil failure is loose or corroded ground
terminals. The typical early symptom is a tach needle that
intermittantly reads significantly too low. It never hurts to clean the
ground terminals every few years.

--
Lanny Chambers, St. Louis, USA
'94C
the alignment page:
http://www.hummingbirds.net/alignment.html