Bruce, I've seen everything from FF, 00, D0 etc...I'd just always thought "FF" was anything unprogrammed or unwritten as yet. (Other than a max value). LW -----Original Message----- From: nacelp <nacelp@bright.net> To: gmecm@diy-efi.org <gmecm@diy-efi.org> Date: February 22, 2000 8:49 AM Subject: Dummy guestion >Does GM often use entries of FF FF as "fillers" in the table area?. >Thanks >Bruce > >