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i know this should be in the scan and tune section but everyone seems to be on here more then anywhere else so here i am. i downloaded everything to start scanning my 91 vette.. i have the screen up to record my info the "datamaster32 engine record mode active." but i can't get any info to come up on the screen. it says i need an authorization there do i get that? they say i get 20 free runs before i have to pay for anything i hope its true. so if anyone is or has used it i would love some help.