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Home >> Jeep >> 2000 >> Grand Cherokee 4WD V8-4.7L VIN N >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Spark Plug >> Service Precautions
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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.
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