So I have an 04 5.4L and I just got it back from the shop with a new 6in lift and 35s. I've been just running it on level 2 towing before the lift. But now I'm wanting to do more of a custom tune to "revive" my truck. I'm not very techsavy when it comes to this stuff so any help would be greatly appreciated. Thanks

 

Look online at Power Hungry Performance. $60/ Tune if you didnt buy the unit from them

 

there are a bunch of tunes people have put together on this site adjusting timings, rev lim, WOT, locking points, shift firm etc...if you dont want to purchase custom one