I'm not a total Noob at RC but I have an issue im about to pull my hair out about. I purchased a Nexstar Select Trainer and flew it a few times and then put it up for a year or so. Recently I get it back out and flew a couple of times with no problems and then took the thing apart to clean it and never run right since. Here is the Issue

I put my finger or the carb while turning the prop to get gas through the line into the carb. I put in the glow plug and get the engine to start. It idles fine and I can rev it up and down with no issues. BUT, If I rev it up and leave the throttle wide open, after 10-15 seconds or so, the engine dies. Not good when you are already in the air. Ive changes glow glugs, all the fuel lines, New fuel, and im at a loss here. Another thing ive notices is that after the engine stops, all the fuel in the line gets sucked back into the tank and a little comes out the pressure line going to the exhaust. It almost seems there is an air leak of some sort but cant figure out where it could be. Hope someone can help.