MX-5 Miata L4-1597cc 1.6L DOHC (1992)
Spark Plug: Testing and Inspection
REMOVAL/INSTALLATION
Spark Plug Wire Removal
CAUTION
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Pulling on the wire part of the spark plug lead may break it. To remove the lead, pull only on the boot.
Install Spark Plug Socket Squarely Over Spark Plugs
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To avoid breaking the spark plug, be sure to fit the socket squarely over it.
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Disconnect the high-tension lead.
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Remove the spark plug.
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Install in the reverse order of removal.
Tightening torque: 15 - 22 Nm (11 - 16 ft. lbs.)
SPARK TEST
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Disconnect the high-tension lead from the spark plug.
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Connect a new spark plug to the high-tension lead.
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Hold the high-tension lead with insulated pliers approx. 5 - 10 mm (0.20 - 0.39 in.) from a ground.
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Crank the engine and verify that a strong blue spark is visible. If not, replace the spark plug or high-tension lead as necessary.
NOTE: If a timing light is used to check for spark, some lights will not illuminate at No.2 and No.4 cylinders even if the ignition system is normal.
