I swapped a 6.0 lq4 with a 4l80 4X4 into my single cab truck and it ran great. Then I decided I wanted more power so I installed a sloppy stage two cam springs and push rods, long tube headers with full 3" x pipe exhaust, cold air intake pipe, HD2 shit kit with the Sonnax valve and a Yukon locker in the rear diff. Got it idling good and for the most part running great but want to dial in my MAF AND VE but having problems right out of the gate hoping someone knows what I have done wrong. Any help would be greatly appreciated.
I created a AFR ERR Histogram and have logged my commanded AFR vs actual with my AEM 300 wide band. I set up my histogram based on Goat rope garage YouTube video and changed everything in the tune to put it in MAF only. The problem I am having is it shows that my error is -60 to -70 percent the longer I log when in fact its not off by much, the truck will be commanding 14.68 and its actually at 14.10. Any idea what I have done wrong?