This is probably a stupid question, but what adjustments should i make? it is a bt 64 ei it only dies when i go from full throttle to idle quickly (such as doing a stall turn). idle is fine, and full throttle is fine, thanks

Well, you may have your idle adjusted to be too lean. Top-end could also be a bit lean. Very likely, the engine's quitting because it's a bit too rich, and when you close the throttle abruptly, too much fuel comes in and chokes the engine.

thanks bax i'll try that. the engine is still new i have about 16 flights on it and have not changed the factory settings yet. i imagine they set them on the rich side for breaking them in?