In a message dated 9/29/04 11:43:57 PM, vw4x4@FYI.NET writes:

<< Cold solder joints in the computer. >>

Another possibility, but I never found any in the three that I had apart.
Still, if the coil and Hall sender are OK, this will be the next step.  The
complication is that the whole while the troubleshooting is going on, the van is
cooling off and settling back into its run mode.  The first time I had a van
stop running when hot because of a hinky Hall sender, it would run for 15
minutes at a time while I was troubleshooting it.  I would start it and let it run
until it stopped then I would go at the troubleshooting until it restarted
again.  It ran in this intermittent manner right up until I went to verify the
operation of the Hall sender, then it started up and ran for almost a month
without dying.  I drove it with no small amount of trepidation.  Just as I was
getting comfortable and ready to assign the problem to a bad connection which I
unwittingly restored during my efforts to fix the problem, it finally died a
permanent death.  I was never so happy to see a car not start.

George