In a message dated 9/27/05 3:26:54 PM, eunrau@YAHOO.CA writes:

<< 1)  does my O2 sensor test prove that it is not at fault?
     2)  any other thoughts on the cause of this problem? >>

Did you validate the quality of the shielded OXS conductor?

In my experience, a Hall sender either works or it doesn't work, with no
middle ground.  There is no gradual lessening of its functioning, although it can
function intermittently.  A queefed out Hall sender can cause the van to just
die and not restart, a condition you can only hope for.  A failing Hall sender
can show various symptoms: at times, a longer cranking period when starting;
a "no start" condition with the van then starting a couple of hours later and
continuing to start for a month; the van starts a dozen times over a period of
an hour, then never starts again; the van hiccups while underway.  The early
warning stage appears to be if the van sometimes takes longer to start then
you are accustomed to and a hiccup with the tach dropping to zip while you are
driving.  A reboot won't clear a faulty Hall sender even for a few minutes.

George