Operation CHARM
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Saturn
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1994
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Coupe L4-1.9L SOHC VIN 9
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Repair and Diagnosis
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Powertrain Management
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Tune-up and Engine Performance Checks
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Spark Plug
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Description and Operation
Spark Plug: Description and Operation
The
spark plugs
allow the high voltage energy from the coils to arc across a gap to ignite the
air/fuel mixture
.