Performance Tool W86554 Inline Ignition Spark Tester
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<b>[Product Information]</b><br>
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<li>Easily connects between the spark plug and spark plug wire.</li>
<li>With the engine running, the tool flashes a mirror image of ignition spark.</li>
<li>Quick and easy test helps check the condition of the ignition system at each cylinder.</li>
<li>Troubleshoot dirty spark plug connections, defective points, bad cables or connections, and more.</li>
<li>Shows voltage to plug, a stronger voltage will create a brighter light.</li>
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