RE: NEW DLE 20cc Gasser! (Data & Links 1st Post)
The ignition are rated for up to 6 volts . The newer ones can stand over that so you need to see what your ECM is rated for. If you have one rated up to 6v you may have aready damaged it. Most all of the gas guys have warned people that you only need 4.8 volt battery. I your engine does the same thing on the ground as it does in the air I would try using a different battery for only the engine and see if that stops the problem on the ground .