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Compression test...best place to ground it.
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<blockquote data-quote="Pappy" data-source="post: 395384" data-attributes="member: 3278"><p>Actually the spark test should not be across the spark plug. </p><p>A valid spark test should be done at cranking speed with no spark plugs in the engine. A set-up where the spark has to jump at least a 1/4" gap is needed. </p><p>Make up something or buy something to accomplish this. </p><p>Jumping the plug gap requires very little secondary voltage and will not uncover weak spark issues.</p></blockquote><p></p>
[QUOTE="Pappy, post: 395384, member: 3278"] Actually the spark test should not be across the spark plug. A valid spark test should be done at cranking speed with no spark plugs in the engine. A set-up where the spark has to jump at least a 1/4" gap is needed. Make up something or buy something to accomplish this. Jumping the plug gap requires very little secondary voltage and will not uncover weak spark issues. [/QUOTE]
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Compression test...best place to ground it.
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