engine temp all over the place
I have a new motor radiator water pump. The new thermostat is 180 degrees. The temp goes up and down from 110 to 180 and never settles or stays at 180. I replaced the thermostat with another new one; with the same results. Any ideas as to what is causing this? Oh by the way I used a laser remote sensor to verify the temp variations. It's not gauge related.