Hey Don,
Thanks for the quick response!
It's running fine now, but then again... it appeared to be running fine by the time I showed up on the scene.
The only reason we drove home slowly is because I wanted her to be able to pull over quickly and safely if she lost engine power. (The 300D was still safer for her to drive than my truck.
)
So anyway... since it got home fine, I really have no idea what the problem was and I have nothing to compare with.