MX-5 Miata LS L4-1.8L DOHC (2001)
Spark Plug: Testing and Inspection
1. Check the following and replace the spark plugs as necessary.
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Damaged insulation
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Worn electrode
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Carbon deposits
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If cleaning is necessary, use a plug cleaner or a wire brush. Wipe upper insulator.
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Damaged gasket
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Burnt condition
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Plug gap
Plug gap:
1.0 - 1.1 mm {0.040 - 0.043 in}