Hobbico sent me a new EI module. *No info about the problem or if they looked at it, just sent a new one and returned my Bosch plug cover. Put new setup into plane-no more grounded plug wire but probelm persists to a lesser degree. Now that I have done everything in the world to this plane and engine to no avail, I have sent for a PCM receiver. I know that this masks the problem but I'd like to fly this plane before I get too much older.
I have no problem with any other gasser that I fly, and I have others of varying makes, Fuji 64, Zenoah 62, US 41, and several others with EI and without it. This Fuji 50EI is all by itself in the trouble department.