My engine temp gauge never gets more than a quarter ways up. Ever. And it's been running rich since I've got it. (Few months ago) and one thing I've noticed is that the fans are always on high. There is always that loud hum coming out of the front whether the car has been running a while or just started. I contacted the previous owner and his said it was a 150 degree thermostat. To me that's a bit low. Factory is like 195 or something. And I figure around 180 is usually the sweet spot. But if the ecu is programmed for 190ish, wouldn't a 150 mess with the system and cause these symptoms? I mainly want the loud hum of the fans to go away but running too cool can causs less the optimal performance.