Quote Originally Posted by GMC-2002-Dmax View Post
The editor has most of what you need to make it rumble or hiss @ idle, with respect to, that IIRC there is 6 or 7 single bit values as well as a "idle vane position" only table and 15 or so "max vane pos" tables that are currently missing in the editor and have to be found in hex, identified and a CAX created to see/edit them in the editor.

Most of what you need is in the editor, some trucks will hiss @ idle and then switch to rumble when in reverse or in motion.

Good Luck
I know this thread is REALLY OLD AND ROTTEN, but out of curiosity, once things like this are figured out, why are they not added to EFI.