Thanks Paul！
I did a test run again yesterday. This is a little cooler start not exceeding 750 degrees by reducing start point setting to AUTO+0. But the engine need raise the fuel level higher than engine to reach idle. This makes me believe that JJ pump is so poor. Do you think that intermittent flame and pop noise occur is due to blocked fuel manifold at idle speed?

Another problem I have is engine only can reach max 110k rmp. Is it due to poor JJ pump again?