New additional symptoms
Thank you, gulfview, for your response. I am more used to working on computers than cars so it is taking me some time to get oriented to the manuals and figuring out how to get to the test points and relays, etc.... That is not stopping the "no start" symptom from getting worse. Is there a place in the 1379 page 1994 Service Manual or the 280 page 1996 Update to find practical, down to earth procedures to test and measure? Otherwise, I will just keep familiarizing myself with the material.
In response to your questions, my biggest challenge is that I have no help so far so I am trying to do this alone. The battery cable connections look solid and I will have to see if there is a way I can do the voltage drop test. The battery does not appear to be an issue because, when the car will not start, a jump start from AAA does nothing. So far as I know, only a push or roll start will get it going again. The starter, which appears to include the starter relay, has been changed out twice without helping the problem. I am working on figuring out how to test the electrical part of the ignition switch.
I have another observation when the problem happens in addition to a new problem symptom. The observation is that when I turn the ignition key to the start position, I do hear a hum. It is NOT a click. It is a hum. It will hum as long as I hold it there but only if the clutch is pushed in. Also, my latest symptom which may or may not be related, is that when I push started the car yesterday, the check engine light came on and it is on always now when the car is on. In addition, after it first came on, if I went over 3000 RPM, the engine would cut out completely. It did not die at all, it just cut out. As long as I up-shifted and kept it under 3000 RPM, it drove fine. I stopped somewhere for 30 minutes. When I started the car the next time (it did start that time) the check engine light was still on but I did not have the 3000 RPM limitation at all. For what it's worth. I will keep plodding along since I must have a car that I can count on. I do not have that now. Thanks again for your thoughts. I may be a novice but I am determined.