that when my truck is in STOCK mode and I tow my 13k trailor up 6 or 7% grades, and mash the go pedal, it seems to fall on its face? If I hit the bottom of the hill at 70mph and DON'T floor it up the hill, it maintaines speed pretty good, but if if half way up the hill, I hit the floor with the skinny pedal, it feels like the power instantly falls back? If I let up a little off the floor, power seems to come back a little. Of course when I have the smarty on level #3, it goes great even floored. So, explain to me why this happens? Thanks guys.

Jason

 

Probably hitting the engines EGT levels, and it's backing down. Somewhere, I once read that the ECM has a defuel set on it somewhere... don't quote me on that, tho...

 

never noticed my trucks ecm monitoring the egt's stock but i'm sure their is something in the ecm to prevent over fueling

 

When I was stock I had the same issue. I added a TAG and it would pull better on the hills.

 

when the ecm sees to much boost it will defuel the truck. thats what it sounds like is happening. i would get a boost fooler and that should help

 

Well, no need for the boost fooler. I run the smarty all the time anyway, so I never have a problem with towing. I guess if I was going to run stock, then I would add a boost fooler. Hard to believe truck would get that hot with all my air mods. EGT gauge doesn't even hit 1200 stock up a steep long hill and it feels like it defuels. I don't know, but thanks for the sugestions guys.

 

Never gets hot hat. Don't know whats going on. I think I'll just leave the Smarty on!