I jsut got back from getting tuned by Slowhawk and the truck runs like a rapped ape! There is one problem though.. at 80mph the AFR goes right to 14.7:1. It doesn't matter if I am at WOT or just rolling towards it. Its almost like it bounces out of PE mode. I don't really have much of an idea what he did but I know the speed limiter wasn't a factor.. any ideas... He uses EFI live

 

Did he do some WOT and high rpm runs while tuning?

 

He did... its almost like a switch, AFR is 11.5 and exacly at 80mph each time.. bam 14.7.. doesn't matter if i'm at WOT or part throttle. OD and 3rd gear did the same thing

 

Did it do it while he was tuning it? Or Later?

 

during the tune.. We ran outa time and couldn't figure it out... I have a basic understanding of tuning (megasuirt) and both he and I checked all the settings we could think of that would be related to speed. He thinks there may be some BCM setting in my truck that he has never seen before because he's never done a quadrasteer denali

 

Not sure how the quadrasteer works but can you turn it on and off?

 

yea you can and we did turn it off. I've had the truck at 80 before but than again I was never monitoring AFR so I have no idea what it did

 

The 80mph lean was killing me.There is no reason for it.No matter what at 80 mph it will not go into or hold the PE.

 

it couldn't be maxing out the maf could i?

 

Has nothing to do with the MAF.