Charging Problem 87 5ktq

[Avi Meron]

I agree, about your possibilities, I have had a blower motor "fry the
brushes" literally! Smell and all.
It can happen,
Take care,
Avi

-----Original Message-----
From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
Behalf Of james accordino
Sent: Tuesday, December 05, 2000 6:15 AM
To: JJK1204 at aol.com
Cc: audi list
Subject: RE: Charging Problem 87 5ktq

--- JJK1204 at aol.com wrote:
> had discharged the battery
> so I gave it a good charging. I could not reproduce
> the problem and after
> quite a bit of inspection and tightening was sure
> that all of the intake and
> crankcase hoses were tight and solid. This morning
> it started to exhibit the
> same pattern as before, not idling well in the
> morning. I noticed that the
> interior lights dimmed considerably when at idle and
> only defroster on. I
> checked the voltage at the HVAC head #11 and found
> that the voltage was 14.1
> with everything off, but quickly dipped to ~12.2
> with only the blower and
> headlights on. If I increased the revs there was
> little or no change. The
> alternator is a lister modified unit less than a
> year old. I replaced the end
> of the small wire to the alternator when I installed
> it and the belt is
> properly tensioned. Is it possible/likely that my
> stalling problem is being
> caused by low voltage?

I believe the low voltage is just a sign of the real
problem.  Is your blower motor original?  If the
charging system is in fact what you say it is, the
blower motor may be putting a tremendous load on the
alternator.  The ISV SHOULD raise the idle, but if
it's not working correctly, this will lead to
stalling/low idle.  Most likely is your
bearing/brushes in the blower motor are shot, and when
cold take a huge amount of current to turn.  As things
warm up, this usually improves slightly.  It could
also be a short in the headlight wiring.  I have seen
this on different makes/types of vehicles, where a
large current draw puts such a load on the alternator,
that it causes the vehicle to stall.  Switch these
items on and off and watch the voltmeter and tach.  I
think you'll find the culprit.

HTH
Jim Accordino