Caravan FWD V6-201 3.3L VIN R MFI (1997)
Spark Plug Overheating
Symptoms: White or gray center electrode insulator that also appears blistered. The increase in electrode gap will be considerably in excess of
0.001 in per 1000 miles of operation.
Possible Causes:
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Plug(s) with wrong heat range.
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Over advanced ignition timing.
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Detonation
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Cooling system malfunction
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Check for lean air-fuel mixture
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Check the torque value of the plugs to ensure good plug-engine seat contact
