Rodeo (4WD) V6-3165cc 3.2L SOHC (6VD1) (1993)
Spark Plug: Testing and Inspection
INSPECTION
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Check the electrodes and insulators for cracks. Replace if faulty.
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Check the electrodes for wear and replace as necessary.
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Check the gaskets for damage and replace as necessary.
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Check insulation resistance with an ohmmeter. Replace if defective.
SPARK PLUG INSULATION RESISTANCE
50 M ohms
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Check spark plug gap. Adjust or replace as necessary.
SPARK PLUG ELECTRODE GAP
1.05 mm (0.040 in)
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If spark plug fouling is excessive, check fuel and electrical systems for possible causes. If those systems are normal, install spark plugs of a
higher heat range.
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If burning of the electrodes or insulator is considerable, install spark plugs of a lower heat range.
SOOTY SPARK PLUGS
If the electrodes and insulators are fouled with carbon or oil, the engine will operate efficiently. There are a number of possible causes:
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Rich fuel mixture.
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Retarded ignition timeing.
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Excessive engine wear (oil in cylinders).
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Incorrect plug gap.
BLISTERED OR SCORCHED SPARK PLUGS
This condition is caused by excessive temperature at the spark plug. Common causes are:
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Lean fuel mixture.
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Advanced ignition timing.
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Incorrect plug gap.
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Incorrect plug heat range.