i cant get my fans to come on unless i command them on using hptuners? why? i have a 160 degree stat and ive tuned the car to turn on fan one at 165 and off at 163 and the second fan to run at 168 and off at 164 but neither fan will come on even if the engine coolant temp goes well above 200 degrees. why would commanding the fans on work and not the normal tune?