I am hoping that I can get an answer to this question. My car is an 2002 3.9l LS. I have done CArfax on it plus the other one that was free on this site. All the mileages agree it appears that no one has messed with the car. Initially it was made for the foreign market ie Canada. It was brought into the US and was a rental car for one year then it went to one private owner. Here is the annoying part I get overspeed warnings on the highway, the car chimes in reverse also in sport mode I always start out in second gear. I would like to get rid of these issues. My ford dealership will reflash the PCM for 106.00. Will this get rid of these rental car crap things. Would a custom tune do the same thing?