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Basic Ignition System Checks: Spark

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  1. If factory tachometer is connected to coil tachometer terminal, disconnect tachometer before performing tests. When removing spark plug wire from spark plug, twist and pull on boot. DO NOT pull on wire.
  2. Using Spark Tester (J-26792), check for spark at each spark plug wire. Leave other wires connected while checking for spark. Check spark plug wire resistance on suspect wires. Ensure resistance is to specification. See appropriate SERVICE & ADJUSTMENT SPECIFICATIONS article.
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