Well  I think I'm on to something.  I headed home today and waited patiently
for the van to "hiccup".  I passed the dreaded 90 mile mark and no problems
then at 136 miles the van started to act up.  Again it didn't stumble but
felt as if it had no power or gas then it would recover.  It continued so I
decided to pull over and reset the ECU.  Turn the engine off then restarted
and the problem did NOT reoccur the rest of the way.

So it must be the AFM problem.  But why didn't my mod fix it?  A list member
did say that they had the same situation, install cap and did not fix, but
installed the harness mod and the problems went away.  I thought the harness
fix was the cap, am I missing something?  Others suggest the AFM or
grounding it.  I will do a resistance check tomorrow and see if there is
fluctuations in the reading and ground it to the alternator.

I may go to Monterey (120 miles) this weekend so hopefully I can do some
work this week and test it then.  I'll let you all know how it goes.

Thanks for all the feedback and bandwidth,
Willie