I have a alpa 40 trainer with the evolution power trainer system in it. I am still fairly new to the hobby and i'm not very good at tuning the engine yet. I can get the engine tuned good before flight to where it runs good at idle and at full throttle, but sometimes when i push the throttle to full it sputters and dies and three times when i was flying yesterday the engine was running great and then it would just die on me. I had to make three dead stick landings but when i got it on the ground it would start right back up and run great. Is anyone else having a problem like this? Any help would be greatly appreciated. It really sucks flying when you can't trust your engine. Thanks