Originally Posted by Cab_Burge
I've never heard a coil hum confused It is talking to you saying something is goofy, I think work
Is your ECU a 4 pin or 5 pin?
What test device are you using?
If it is a volt ohm meter what is your battery voltage with nothing turned on and what is it with the key turned on to the run position and then in the start position?
You can fix this, it is something, wiring, that is not connected correctly scope up


When I say Hum, it's trying to constantly fire, If I remove the plug wire from it, a spark show emerges.

The ECU is a MP Orange Unit, 4 Pin.

I'm using this Ideal tester https://www.idealindustries.ca/products/electrical/electrical-testing/61-746.html

Battery Voltage is 12.9V at the terminals, which I also get unless I'm on the Bypass Circuit/IGN 2 and it's 8.9V

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