RTH,

I feel for you, I've had problems like this before on another kind of car and it can be frustrating. I'm no rocket scientist when it comes to these cars, but I have to ask out of curiosity, have you ever placed the thermostat in a pot of boiling water to ensure that it opens under the right temperature? I seem to recall doing this several years ago only to discover the thermostat was bad, and NEVER did open in the boiling water, however the new replacement did open when placed in the water. Just my two cents worth and a whole lot of curiosity.

jeric