Posted on the L39 thread, thought I'd copy across here- just in case someone actually uses the search function!
ORIGINAL: dbateman
The engine problem now seems solved. A combination of backflushing the fuel filter, resetting the accel/deaccel delays to "25" , stability delay to 50 and last but not least reprograming the radio and ecu very carefully as if new. Once this was done I ran the engine up to full power very slowly , returned to idle, again slowly and repeated this2 more times to imprint the ecu. Had two perfect flights today in about 90 degree weather with no problem. The performance does suffer a little in the heat and humidity.Probably do to the small size of the powerplant, but the plane does fly very scale jet like and lands with ease. Doug......