OK, so got my Stevens DVA, coil extenders, and the resistance load pigtail. All I can say is it is effen awesome to have the right tools for the job.
Anyhow, I went through all the various ignition system tests: Running Output (failed), Charge Coil (passed), Sensor Coil (passed). It led me through the process to the final step, which was the Power Pack test (failed). All 3 outputs were 190V, and should be 230V, so I am going to get a new power pack with relative confidence that this actually needs replacing.
However, I decided for fun to do the Stator and Rectifier test, which is in a totally different section under the "Charging System".
The Rectifier had some really weird readings, which I am still trying analyze. The manual is pretty vague on what is "high" and "low" reading, but I know it charges the battery when running, so I am not too worried about this right now.
BUT, the Stator test shows 1.7 Ohms, and the manual says it should be 1.3 Ohms +/- 0.1 Ohm, pretty clear it is out of spec.
I really don't look forward to replacing the Stator with the associated cost of $250+ and having to remove the flywheel (I think).
So questions: Am I risking anything by replacing the Power Pack and not the Stator? Is there a way for the Stator to be "kind of" out of spec, but good enough for now?
And most importantly, can a faulty Power Pack like mine contribute to the rough idle issue?