Mountaineer 4WD V6-4.0L VIN E (1999)
Spark Plug: Description and Operation
Spark plug wires carry high voltage pulses from the ignition coil to the spark plugs.
The spark plugs:
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change high voltage pulses to spark at the gap which ignites the fuel and air mixture.
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have a platinum-enhanced active electrode for long life. The active electrode is different for LH and RH sides.
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have replacements with both electrodes platinum-enhanced so they can be used on either side.
