yea..same shit with nismoalty's car. my car did that for a while too. just do what i told you..the temp gauge is mechanical so if the outer rubber hose tears and exposes the wire..the readings will get all messed up. if you guys dont know the thermostat is..i'll tell ya. from the radiator..the top hose connects to the motor. there is a little sensor attached to it. check the cord the sensor is connected to for any place where the wire may be exposed. get some silicone hosing, rubber hosing..anything small in diamter to put over it. it should be fixed.