Craig,

You might want to check the aneroid bell on the fuel pump, as on one occasion after reaching about 100 feet after takeoff my fuel flow went to over 50 gals causing belching black smoke and the engine shuddered from getting way too much fuel. 

Pat

                Looking at the MVP50 data (which is the best I’ve ever seen by the way) the fuel follows the MP and there is nothing in the fuel system that will cause the MP to change.  Therefore, I have ruled out the fuel system as the core problem.  Craig