Originally Posted by jaycanode
Jumping the starter is good suggestion.
Concerning CTS: When I monitor OBD2 gauges, coolant temp reading looks within reason. I have 2 coolant sensors next to each other and they agree with each other. Can I trust the OBD gauges to tell me if CTS is OK?
Ahh, ok. At first you mentioned you ruled it out because of a stubborn start at any temp. Ruling it out because of ok readings via OBD2 sounds way more reasonable. I'm not aware of any cases where OBD2 would lie about coolant temp, so I think it's ok to rely on those readings.
When you mention "tests" for the ignition, what kind of tests? What kind of results? I'm reaching the point where I won't be able to help you much, but putting that info up may get some better responses.