My saturn 1994 s12 is overheating even after i changed the water pump.

Cooling fan work ? did you try replacing the thermostat ! s12 ?
sc1 , sc2 , sL ,sL1 , sL 2 , sw1 , sw2 ? I guessing sL2 , clogged radiator .

How hot is it getting in degrees F? Some electric fans won't even turn on, till around 220 degrees F. Does the fan turn on at all?
As far as overheating, does the coolant recovery reservoir fill up in a hurry?
Sometimes after opening up the cooling system, you get air in the system that may cause temp gage to react.
What about your thermostat? Did you check for coolant flow through the radiator? Another thought might be a head gasket issue, I'd check everything else first.