Date:         Thu, 20 Dec 2007 19:22:01 -0800
Reply-To:     Brian Jarvinen <brianvwagain@YAHOO.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Brian Jarvinen <brianvwagain@YAHOO.COM>
Subject:      Hall Control Unit and stalling
Content-Type: text/plain; charset=iso-8859-1

Well I beat an outbreak of the herky-jerkies this
fall. It took a long time to find, because I had
already
been through this obscure problem once and failed
to do the easy fix and didn't expect it to happen
again.

One time around 100K miles my van died after hitting
a moderate bump. While checking things out in the
motor, I happened to jiggle the wires going into the
Hall Control Unit (HCU) and the motor turned over - I
had
left the key in the RUN postition. I slowly determined
that if I held those wires in a just exactly perfect
position, the van ran fine. I am fortunate to have an
extra van, so I just spliced in the other connector to
the HCU and things have been great (sorta...) for
another
150K miles.

What I failed to do and should have, is relieve the
strain on this connection with a zip tie. Perhaps this
would have fixed this problem the first time without
a splice. But one zip tie around the wire bundle,
up to the convenient wire loop on the HCU connector
and problem solved.

Somewhere in the archives during this progress I
read someone mention using zip-ties to help avoid
wire stress and that was great advice!

I've posted that story before but without the zip-tie
conclusion. You may want to add one at this location
yourself.....




And while I've got the eyes of people wondering
about potential problems with the Hall chip, I can
remind you here that when it is hot out (the 'sorta'
part),
 the heat
sink behind that chip is really important, perhaps
more so as the age of that chip gets up there. It
is best to keep that heat sink clean, and just to keep
it more efficient, you can use a handy substance
called, appropriately enough, Heat Sink Transfer
Compound. I got some at Radio Shack for 99 cents.


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