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Home >> Ford >> 1986 >> Escort Pony >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - TFI >> Testing >> Testing Spark Plug

Testing Spark Plug

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Use a spark tester tool (if available), or modify a spark plug (cut off side terminal and install spring clip for grounding plug housing) for use in testing ignition system. See Fig 1.

Fig 1: Modifies Spark Plug and Spark Tester Modify spark plug by cutting off side electrode and installing spring clip.
G740