Ok first and for most my tuner is taken care of it free of charge and is going UP and BEYOND to help me out. This is what you call REAL service


Ok so heres the "problem" got the evo tuned Thursday. We put a manual boost controller on there and got up to 25psi held nice and great. Af was 11.2-11.4's

Went for a road test and my AEM wideband read the same ROCK SOLID 11.2-11.4

I came home and took the controller off to reinstall it cleaner (we threw it on there because of time and he did get me on the dyno with only a few hours of notice)

I reinstall it and set the boost back to what he told me. and now the A/f have gotten fatter ranging from 10.8-11.5 I did it in 4th gear on a straight flat road. What can cause something like this to change?

 

either the boost isn't the same

or you havn't done the "disable LTFT from affecting WOT" mod of mine...

or something else is wrong

 

whats the disable the ltft from affecting wot?

 

https://www.evolutionm.net/forums/ev...t-fueling.html

 

weather conditions plays a role

 

Thats what I thought to but temps were only 3-5 degrees difference at the MOST