Hi, all.
Based on the comments, I have tried a few things so far. When I first just turn the key to the on position, I do get the fuel pump start up and go off soon - just as I would expect it to do (to pressurize). But when I start the engine, I still hear a faint low buzzing sound that I do not seem to remember from before. It is not the radio antenna - I turned the radio off based on Chally's thought and I still got the low buzz. Next step will be to get somebody else to turn on the engine outside my garage - I think the engine noise is masking the sound too much to be locatable.
I am still leaning towards a failing fuel pump as being the culprit. Not sure, though, so I will have the local Infinit dealer check it out when I am able to drive there, if I cannot figure out otherwise.
Thanks, folks, for all the good thoughts and wishes about my recovery. It is happening, albeit slowly. I feel good to be alive!
Z