Custom OS #5

[JustinD]

My buddy has an 02 2500HD, we had Blackbear write us a tune for it, he wants to run a 150hp shot of spray, Justin asked me to upgrade his OS to the custom OS #5, I see the instructions on the tutorial tab in EFI but it only goes up to custom OS #3??? Anybody have any insight on how to make this simpler? The truck is a 6.0.

Thanks
Justin

[joecar]

Follow that same tutorial for COS5, but also read the COS5.txt attached to post #315 of this thread: Custom-OS-5 (http://forum.efilive.com/showthread.php?2599-Custom-OS-5)

[joecar]

COS Upgrade Procedure:

Upgrade from 12212156 to COS3 or COS5 like this:
- full flash of COS3/5,
- cal only flash from 12212156,
- read back from PCM and save to file,
- edit file and fix any out-of-range cells (including A0012, A0013),
- look thru all tables for sane values and fix the insane ones (see Important below),
- cal only flash.

Important: make sure that all the Axxxx tables and B3647 contain sane values.

OOR: make sure you get rid of the blue dogear corners.