I don't have answers to all of your questions yet but I will do some
work tomorrow and get back to you.

What I can tell you:

We went ahead and replaced the spark plug wires (since it should have
been done with the other stuff... I know, I know) and that's not the
trick.

I have not tried injector cleaner. I will be sure to once I can get
the dang thing going again! (I'm trying to sweet talk my way into a
heated garage, so we'll see.)

If I push the pedal half-way or all of the way down it doesn't seem to
make a difference. I can smell exhaust if I do press the pedal down.
I have not tried it for 30 seconds and then waited 5 min. yet.

I do hear the fuel pump run when the key is in II.

Yes, the CEL comes on for two seconds and then goes off.

We have tried Tegger's suggestion of letting the fuel pump run it's 2
sec cycle 10-12 times in a row and that didn't work either. Can I
assume that the rail is keeping adequate pressure since this trick
didn't work?

Untold riches await whoever can figure this *stuff* out!