Joined
·
1,314 Posts
Might gain more traction in the EFI live forum, but i would say unless you have extensive mods to the truck, your stock altitude maps should work still OK on that truck. You tuner may have made slight adjustments to get more out of it and neglected to impart that into your higher altitude tables so, you may be down on power but should perform closer to stock i'd think. He gave you a 16% boost (from 258 to 300kPa) so you could try that in your med/high tables and see if you get your power back. I've never worked on the 2.8 but, is there also fueling tables for med/high as well? My LMM does. So you'd adjust up your fuel and boost (they work in conjunction of course).
