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I had the mechanics triple check the timing. No resolve.

It actually runs better very LOP. The issue goes away.

Hi All, I have an electroair electronic ignition setup paired with a mag on a my Comanche 250 (converted to fuel injection). The system works well below 80% power but at WOT/takeoff/manifold pressure at or greater than 25 inches, the engine stutters and makes a scratching noise. You can feel...