Miata Mailing List: July 1993, Message #70
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   From: "John W. Driver" <70233.1654@CompuServe.COM>
Subject: IGNITION WIRES
   Date: Fri, 9 Jul 1993 02:18:03 -0400


I was talking to my dealer's service writer today (ouch - new battery
after 3 1/2 years), and he has an interesting theory about the skipping
(missing) that happens around 30,000 to 35,000 miles, and results in
the replacement of spark plug wires.  He thinks that the spark plugs
are worn out at that mileage and the resultant higher resistance, and
thus higher voltage required to fire, them "blows out" the ignition
wires, which causes the wires to start shorting out.  Any of you
electronic geniuses have any thoughts on this?

John Driver