The description in the service manual for Saturn cars says that if the circuit for one plug becomes open the other is grounded through the ignition module. That leads me to believe that there is a circuit in there that has a higher resistance than is normally encountered in the secondary ignition circuit so it only becomes a factor if the resistance for one of the plugs goes out of its normal range.
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Today's Featured Article - The Collection of a Lifetime - by Sherry Schaefer. The larest gathering of orphan tractors ever assembled by one collector will be auctioned off on May 15 in Rock Island, IL. Ed Spiess was a well known tractor buff who spent most of his time dreaming of rare and unknown tractors. His background as an agricultural engineer sparked his interest in the unique attributes of the models built from 1939-1959.
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