i have a 2001 corvette ls1b pcm that i used the v8 scan software to read the factory file, i went to open it and it required efilive 7.5 to edit/modify it, when i tryed to save the file it wont let me in 7.5, the file name ends in .ctz for some reason, am i missing something here? sorry first time user of efilive, i thought the customer would have already finished all the connectivity before bringing it over for tuning. just spent near 2 hours of reading and updating everything.
any help would be appreciated