Since my Mooney is going for an annual by the end of this month I flew up to 11,500 feet to perform "in-flight engine diagnostic tests" as recommended by Mike Busch and SavvyAviation. The tests I did were the GAMI sweep to confirm my GAMIjectors were performing as expected and also a LOP mag check to evaluate the ignition system. In the video I show part of the "sweep" and the LOP mag check and then go on to show how SavvyAviation displays the data collected by the engine analyzer. On their site one can toggle through GAMI sweep views as well as Mag check views. If you subscribe to their service they will also give you a detailed report of the findings. I also show what the report looks like.
CK