How did they know it was tuned? Did u tell them? Did u flash back to stock and put stock intake back in before bringing it in? Did u disconnect battery after all of that and drive >50miles? After 50 miles the stock computer would only have logs of timing advance/retard showing stock adjustments. The check sum counter can be explained away as well. Pm me with any questions. Good luck.
That seems like a VERY bad idea. You reflash it,drive it 50 miles and cause even MORE damage to the engine,then if they reject your warranty,you have that much more money to spend on the repairs. If you blow your engine,it should be around a grand to fix it,if you know what your doing. At most,around 3k,and it will be better than it was from the factory. If you DONT know how to fix it,then you DONT KNOW enough about engines to go messing with tunes anyway. Leave it to the people that do,and enjoy your car as is. Its already damn fast.
The real problem is not bad tunes,or Ford not helping them make the tunes better. Back in the day,people who modified their vehicles for more power had to know what they were doing. Now,you go buy a little box off the internet,and it changes around valve timing and ignition timing and fuel ratios and you dont have to understand it at all. When it all goes sideways on you,you were promised by that company on the internet that it was safe so you blame Ford.
Why dont ALL of our cars that were tune have the problems? Well,its becuase all of our cars are not identical. Some will be capable of more power,some less. Its just like overclocking a CPU,sometimes you get a gem that will overclock 40% and sometimes you cant go beyond the rated speed at all. You dont blame Intel ,becuase you got one that would not,or that runs hotter than others but still within the rated power. These engines are mass produced within a certain tolerance. They make a tune that has to work on ALL of the engines they make. If you go to far outside those stock parameters,maybe its going to work,maybe its going blow up on you. Just depends on how lucky you are.
Sometimes, I see cops with their backs turned writing tickets. When I drive by I can see them stick their heads up,and sniff the air,catching a whiff of exhaust and burning rubber,the crimson smell of speed,telling them a Race Red Mustang is somewhere nearby!
2012 Race Red GT, Kenwood Navigation system with Metra dash kit,GT500 steering wheel,Steering wheel buttons INCLUDING BT enabled,Takeoff leather seats with seat heaters.