I bought a tower hobbies pro 46 engine new from tower. It ran good for the 1st 6 flights very strong and reliable. Then it deadsticked on one flight. Since the deadstick it will not tune up right at all. It will idle all day long but when i advance the throttle to full it surges from loading up real bad to leaning out and back to loading up. it will not run wide open. At wide open it does this and then trys to die. if i drop the throttle a tad above idle it will not die. When I give it full power it will come close to wide open then it drops rpms. It makes alot of nose in the carb like a cold leaf blower engine. The loud baaaa noise. I have turned the high speed needle to all kinds of settings from very rich to very lean and it doesnt change. i turned the low end from super rich to lean and it acts the same way. I even sealed the back plate and the carb joint with RVT.

WHat do i need to do to get it running right?