UPDATE:

Took her out for a 15 min. drive. Running stronger than before. No hesitation, no sputtering, worked perfectly well.

I'm taking her out for an hour tomorrow. Hopefully won't need a tow back.

I'm not celebrating yet, 'cuz I just might jinx it. If it's fixed for good, I'm celebrating on Saturday by taking her for an off-road stroll to the beach.