Im hoping for a bit of advice on a new project I have. I reciently purchased an AT-6 and a new TT .46 pro. I ran a tank full through per instructions and then another for good measure. at the 2.5 turns out of the needle which is supposed to be the starting point, the engine starts well but dies abruptly at about 2/3 throttle(lean I guess). Turning the needle out a couple more full turns allows it to get to full open but when I tip the nose up it dies. If i turn the needle out until it almost falls out I can get it to keep running with the nose up but it sags a bit. It wont run at all nose up unless the fuel tank pressure line is disconnected from the muffler. Im baffeled. The tank is installed per instructions. I have a reliable idle and good transition. Please let me know if you have any ideas. I am getting back into the hobby after a ten year abscence. Thanks everyone. Randy