I need help. I had a 160 degree thermostat put in and the programmer that was going to change the fan settings got sick and I have to pick up the car. What kind of problems if any will I run into with the fans kicking in at the factory settings?
No problems. The car will just run to a max coolant temp of 235F (I think) instead of the fan setting you want. Remember the tstat only controls the minimum coolant temp. Once it's open all the way, the radiator is doing max cooling and it needs to fans to come on to help. The change in performance is probably not too noticable. Over 212F coolant temp the engine controller will kick in some more fuel to keep the EGT cool and help on cat life.