Question for spark plug gurus

I'm looking for test protocols for spark plug test (functional/performance). Any assistance is very appreciated.
Thanks

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felsh
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Sergio Santos wrote:

Continuity, insulation resistance and breakdown voltage.
The insulation resistance/breakdown voltage might be a bit difficult to measure because the plug might 'fire' at the correct voltage, but discharge through a cracked insulator or carbon track. The proper breakdown test is probably partly visual (make sure the spark occurs at the correct place).
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Paul Hovnanian mailto: snipped-for-privacy@Hovnanian.com
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