Just resolved it. The valve in the fuel tank was shut, it must of rattled itself that way, quick twist and a few minutes later the engine went flying again. It explains why it would happen after awhile, because it would create a vacuum in the fuel tank. But I think I can explain the reason for last trip to not have any throttle, I accidently touched an adjustment that was meant to let the butterfly open completely, so it would not let me go past a certain speed. So anyways long hard yards are now done, it starts first go, and flies like a rocket, thanks for every one's help in helping me try to diagnose this issue.