F 250 4WD Pickup V6-4.2L VIN 2 (1998)
Spark Plug: Description and Operation
The spark plugs:
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change high voltage pulses to spark at a gap which ignites 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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used for replacement are AGSF-34EE; the electrodes are platinum-enhanced so they can replace either a RH or LH spark plug.