Thanks very much to everyone for the advice. The van has 164k miles on
it and a home spray paint job courtesy of the PO. It doesn't look bad
but it's defiantly not good. It has a good interior and drove well. I
changed the Temp II sensor awhile back, before it was having the problem
it's having now. I'll try changing it again to see if that is what's
wrong. Thanks again.

Marty