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Jeep
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2000
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Grand Cherokee 2WD V8-4.7L VIN N
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Repair and Diagnosis
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Powertrain Management
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Ignition System
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Spark Plug
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Service Precautions
Spark Plug: Service Precautions
CAUTION:
Never use a motorized wire wheel brush to clean the
spark plugs
. Metallic deposits will remain on the spark plug insulator and will cause plug misfire.