Well i've found a tow/economy tune from some guy out in California that is supposed to be good. I had to download efi live to open and change my file to match his. The 120hp programmer i originally went by had alot of fuel down low.. this guys didn't hardly add much. So I guess i'm going to go reflash his truck before he kills something. haha. He's an older man so I don't think he beats on it too much.