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I wouldn't call it a "problem", at least not to normal driving and operation. The problem will only occur if for whatever reason you've been repeatedly cranking the engine and building up unburned fuel in the cylinder. When it finally goes to crank, it will ignite the unburned mixture resulting in a backfire that otherwise wouldn't occur with an ignition system firing plugs individually.
That's the whole point of this. I'm running distributorless without any crazy cylinder identification electronics, or additional cam or crank pickups. I'm firing all the honda coils at once, and it's working. I saw somebody had done this on club4ag and wanted to try it for myself. I wouldn't have otherwise tried it as I would have thought ignition at the bottom of the intake stroke would surely occur. This happens to not be the case.
This setup also eliminates the need for wires. These particular honda coils are a dime a dozen. You can get a set for $25 sometimes.
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