Mike, how about changing the coolant level sender on top of the expansion
tank (the one left in the engine compartment), and/or check the connector on
it...

That black thing on the tank with the blus cap, close to that cap:
http://www.benplace.com/85rouge/rouge137.jpg

If that does't work, you will have to remove the console, in the back, you
will see many little 6mm (or 7mm??) small bolt, brass color, tight them up.

http://www.benplace.com/dash/dash14.jpg

Cheers, Ben