Was wandering if someone has a good tow tune for 04 LB7 tune. I tried the 20/20 tune on the sticky at the top of the page. Problem is I don't have any of the settings in my ECM because the tune is for a 06 LBZ. Have only tuned gas engines with HP Tuners and don't know much about diesel.
I use to get 21MPG with a Edge/Attitute chip. The chip started causing all kinds of problems. Truck was dying in the middle of an intersection and would not restart. I would have to get out and unplug chip and put back to stock. I was getting all kinds of fuel codes coming up so I pulled the chip off. So now that the truck is stock I had injectors replaced about 10,000 miles ago. I cant get over 11 MPG pulling a 5000 lb trailer. on average its more like 10.3MPG. Truck has a 6 inch lift with 315/75R16 tires I tried recalculating for tire size but nothing seems to change the speedo. Cant find an actual tire size in the speedo settings like a gas motor. So long story short the truck runs like crap and gets even worse fuel mileage. Ever since I plugged the HP Tuners into the truck it has never been right. I have saved my original read and have uploaded that back in the truck with no performance gain. So my question is can the program get screwed up and I just need a good tune to get my truck back to where it should be. I was considering ordering another chip but I have the money tied up in HP Tuners so I might as well use it if I can figure it out. Also truck has K&N cold air intake and Banks 4" exhaust. Any help is greatly appreciated. Truck has 78K miles on it currently so should just be getting broke in.