I have been testing the Turboprop engine some more to eliminate the Acceleration Error I was getting right after the engine starts and releases throttle control. The engine would basically bog and blow puffs of smoke when attempting to throttle up beyond 65,000 rpms. I would have to gently back off a couple of clicks on the throttle and then slowly throttle up and after that, the engine would respond normally to throttle commands. The second engine run went smoothly (~1/2 hour later). I will repeat my startup and warmup procedures again the next time to verify whether this resolves this issue or not. If so, then that will be my normal procedure. If not, then I will need to contact WREN Power Systems for further analysis. The fuel system appears to be free of any air bubbles that might contribute to the issue.