I want to thank all of you for your suggestions. Inasmuch as I already paid for the repair, I am going to give the repair shop one more chance to remedy the problem. It is interesting because I have run this engine all year and it just stopped cycling. Seems strange that the repair shop diagnosed the problem, seemingly fixed it because it did work well, and then the engine quit again. That is why I was thinking that something external to the engine might have precipitated the problem again. I thought that maybe there was too much voltage over the switches or some bad connection that might have caused repercussions with the e-unit. I will say that when I lower the voltage on the switches, the engine derails as it passes over the curved portion of the switch after I flip the controller. I have to increase the voltage even though the lower voltage is sufficient to trip the switch. That is why I thought maybe the increased voltage might have played havoc with the e-unit, causing it to eventually malfunction.
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