I have an old 501D13, (T56) built in 1954. We use it to pull air through a wind tunnel. I had to swap it out with an engine that was sitting in an engine can for 5 years. The new engine is giving me hot starts and high fuel flow at ground idle. I checked and rechecked the rigging. Swapped the TD valve and fuel control. This engine is unique, it does not have a TD amp, or TD control. Any ideas at what else I can look at or swap out to see if I can get this problem fixed? Its a difficult problem to diagnose because its run by a computer using a PLC.