Originally Posted by Mike@N54Tuning.com
Interesting I read there were two flashes and Wedge told me there was only one. Anyway I'm pretty sure you need to disable the o2 biasing just like the JB4 guys do when running the BMS flash. That transfers control of the fueling over to the flash side instead of having the flash adding fuel and the piggy adding even more fuel on top of that.
Sorry Mike, I stand corrected. I didn't realize Shiv was doing a few things differently for flex vs non flex. A lot of things have changed from the time I got my first flash. I know I ran rich (11.8) prior to getting flashed before shift sector.