How to test Coil Pack

This video show how to test Coil Pack
-First start the engine
GOOD COIL PACK
-Unplug the coil pack, if the engine idle gets low or weak that means your Coil Pack is GOOD
BAD COIL PACK
-If you unplug your coil pack and engine idle the same (no difference in sound of engine) then its a BAD Coil Pack
I HOPE THIS HELP SOMEONE
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[@Micheal-ek5sw]

Thanks my man appreciate you