F550 & Spartan 250 tune
Help. I was helping a friend install his tuner this evening. During the install, after the reflash, and while it was erasing files, I misread the tuner and turned the key off, when it read "Do Not Turn Key Off". The guy's at Spartan emailed me the original stock tune, I installed it, but the tuner will not communicate with the truck. They say that the TCM may be gone. Has anyone had this happen to them? Is there an option to either reset, or repair the TCM?
Also, does anyone know what he can expect for fuel mileage gains with this config? (once it is running of course) Thanks in advance.