Hi, Guys after changing new battery and run DA-100 again, all problem gone, set needle, very smooth transition, turn NX 26x10 low 1500, high 6300 (still at rich side),fortunately I didn't fry my engine, I broke in all my gaser on test stand before, no matter what brand, DA,3W, ZDZ, MVVS, and did have any problem at all. But I will take your advice, just put new engine on plane and go fly in future.

Thank again for input.