I popped the cover off where the throttle and cruise control cable are attached and the cruise control cable was not hooked up. The bracket that is discussed in some articles was not broken and everything seemed normal except that the end of the cruise control cable was just hanging in air, like this one (not my car)
As I said, the bracket mentioned in some articles is not broken, so I don't know why the cable came off. I hooked it back on, tested the cruise control and it works fine now.
My wife never
uses the cruise control and never noticed the self-acceleration problem until after I drove the car for a few days last week. It was I that tried the cruise control and found that it didn't work and then noticed the acceleration problem the next day. Maybe the cable was jammed up from non-use and popped off the first time I tried to use the cruise control. Maybe now that I freed it up by trying to use it, it'll stay hooked up.
As far as the acceleration problem, we won't know if it's fixed unless it happens again and then we'll know it's not. It's intermittent, so it's one of those where I'll never know if it's fixed until I know that it isn't.
We'll just have to wait and see.