I have a 94 Ford Explorer. Today when I accelerated, the temp guage dropped to cold and the check engine light came on. I went to Auto Zone and of course their diagnostic machine for older cars is not working. They seemed to think it was the temp sensor or the thermostat. I'm looking for a local mechanic that can just go ahead and replace both for me. I will go buy the parts if you can provide the service.  Please let me know what you would charge. Thanks, Christi