The bearings or bushing in your fan are bad. You'll have to replace it before it seizes. This is for an electrical fan. If it were belt driven then the rubber belt would be glazed and slipping. Cure would be to replace the belt and ensure that it has the correct amount of tension so that it doesn't slip. By the way I'm pretty sure your Acura's fan is electric, so the reason it comes and goes is because the sensor kicks in the fan as you're driving and once it cools it turns the fan off.