Need a Hella XL & 200 q problem

[Brian Armstead <barmstea@ibb.gov>]

Listers:  Busted one Hella XL pulling out of a driveway last night.  My
world is very dim now.  Anyone have a single XL (or a pair) for
sale/trade?

Regarding my 200q.  When I first start the car in the morning, the volt
meter will sometimes show about 10 volts, and the battery and check
engine lights will illuminate even though the engine is running.  If I
blip the throttle (get the revs just over 1600), the lights will go out
on the dash, the voltage reading jumps up past 14, and I hear a noise
that sounds like a compressor engaging (not a clicking sound, but a
whirring sound as if some auxilliary pump just turned on.  The car has
done this for about seven months now.  If the car is warm, it won't do
it.  Never had the battery drain because of this, since the problem goes
away as soon as you rev the car.  Alternator brushes are in good shape.

Weird problem that I have never seen described on the list before.  Any
thoughts?

TIA,

Brian
Early '89 200q