I disagree that this seems like classic vanagon syndrome.
Classic vanagon syndrome happens after steady pedal on the
highway for some extended period of time.  Think level
interstate highway at 65 mph for 15 minutes.

Urban or suburban driving syndrome is something else.  When
she is going up a hill, she is applying pedal.

I have a VW pigtail for sale, but I don't think Joy should
buy it.  It would not cure her problem.  Unfortunately, I don't
know what will, but I think the vanagon syndrome cure would be
a waste.

Of course, she should have the cure because SOMEDAY she WILL
have vanagon syndrome.  ;-)

Richard