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Old 01-20-2015, 11:08 PM   #1
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Default Do i need to run my coil on plug on switched power?

Do i need to run my coil on plug on switched power? running from my megasquirt and wondering if the 12v power need to be a switched power feed.
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Old 01-21-2015, 10:29 AM   #2
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Switched is definitely better.
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Old 01-21-2015, 12:35 PM   #3
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If you run it on always-on 12V, there's a possibility that the coil drivers will "phantom power" the ECU through the coil outputs, leading to unpredictable behaviour.

Additionally, the circuitry of the coil packs will drain your battery.
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Old 01-21-2015, 02:47 PM   #4
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I figured it was a bad idea, but was not quite sure. Thank you for your help
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