I have a similar sound that sometimes will eminate from the gas tank
area-- a kind of whirring that is constant, then goes to a cycle on off
mode, then stops. I'm guessing the fuel pump is doing something. The car
runs great, so I haven't looked further. I'm curious what your inquiry
will yield, because they sound like similar things, only different
places on the car. BTW, mines' an Inifiniti G20T I4 engine.

pravinkpant@hotmail.com wrote:

Hello,
I recently bought a 1994 Honda Accord LX, with 195,000 miles. As I was
walking out to my car this morning, I heard a strange ongoing
high-pitched tone, which could best be described as a more faint version
of the horn. I panicked, thinking that the horn switch somehow froze in
place (I'm in Boston) and drained the battery overnight, and sounded
faint because it was on its last legs.
However, I got in the car, and it wasn't the horn - in fact, the car had
plenty of juice to crank and turn over. I got to work (with the strange
tone still blaring) and identified it as coming somewhere from the
engine bay. It almost sounded similar to a door buzzer (though I don't
recall what the door-ajar sounds like since I've only had the car about
a week) but it was loud enough to hear from about 10 feet away from the
car.
The beeeeep sound continued but started to go off and on, and finally
shut out right as I was about to disconnect my battery.
Any ideas on what this could be / have been?? I'm so completely baffled.
Thanks,
Pravin