John-

As Carlos stated, this engine ran perfectly about 6-8 weeks ago when we were out flying the Roo at WDM. It was brought back from the field to my house where it's hung safely in the garage. Nothing's changed, none of the lines were pulled, etc. The only thing we could think of is that the battery may have lost charge, and the ECU may have lost its "learned" programming.... (dunno about that though.... old tech and all). Carlos said he "re-taught" the ECU and Tx, and that's when it started lighting the plug.

Mark