OK i get why tunes get locked, but what if your like the 4-5 owner of the car your maf and Mafia take a shit, now you want to go with a blow through MAF like a HPX or something and now you cannot access the ECU to make the chances to fix er up. Thats where im at now. My choices are to buy a new mafia and stock 03 mach 1 MAF or...actually idk what other choices I have...SCT x4, but that's not going to be able to adjust my fuel tables and do all the things the HP software can do. I talked to my best friend who is a foreman now at a BMW dealer out in MA and he says he has free software on that he can use from his phone via usb to OBD2 plug and unlock his ECU as well as upload custom tune files that he creates. Anyone know of anything like that for the 01-04 mustang ECU, or specifically the 03 mach 1? Im kinda stuck at this point and dont have enough exp tuning to get my car running right, it stalls all the time due the maf reading 0.08V, runs super lean, and can only muster about 1-2 lbs of boost where i should get around 8...im all assuming this is because the fuel map is telling it not to deliver anymore fuel. so uhmm anyone HELP!