Excessive RPM drop on mag check (Mag on left, LSI on right) reveals #3 plug not firing based on EGT drop when LSI is shut down.
Numerous swapping of components have me concluding that it is indeed #3 mag plug not firing, but that the spark plug is NOT the problem.
I then swapped out the harness to determine if the problem was in the harness. No change, still excessive RPM drop and corresponding EGT drop on #3 when LSI shut down.
That leads me to believe the problem is in the mag.
Any suggestions. LSI ignition working properly. All other cylinders appear normal.
Numerous swapping of components have me concluding that it is indeed #3 mag plug not firing, but that the spark plug is NOT the problem.
I then swapped out the harness to determine if the problem was in the harness. No change, still excessive RPM drop and corresponding EGT drop on #3 when LSI shut down.
That leads me to believe the problem is in the mag.
Any suggestions. LSI ignition working properly. All other cylinders appear normal.