Thanks John.

>I had a similar problem with my '84, and it seems to be tied to
>electrical connections.  I removed the computer connector and put it
>back on, and things seem fine now.

How long has it been since you did this?  Did you do anything else at the
same time?
Someone else suggested cleaning all my ground connections, and also switching
my relay units.  SO MANY SUGGESTIONS!  It's great, and I guess I've got to
try them all.  I can't imagine trusting this vehicle on a road trip though...
what a shame, especially after seeing so many on the road that seem just
fine.

02 sensors seem to be a source of confusion... some prefer running without.