I only have a pulley driven fan and I can run around all day with the a/c, on a hot day, and be fine.

Did you check?

Coolant mixture
water pump
t-stat
air in the system

Checks
 

Yes I changed thermo, changed rad cap, burped it and burped it. I have not pulled the water pump.

i recommend changing the water pump and check your thermostat housing sensors

Term sensors
 

How do you check the thermostat sensors? My temp guage works as it should. I thought there was only one. Please explain, Thanks

Success
 

FIXED IT!
Here is the explanation I didn't want to clutter up the board any worse than I have! Thanks so MUCH!

http://www.toyota-supra.info/forums/...html#post84699