Attention: TDR Forum Junkies 
Here is the skinny on an TS Performance MP8 for an 2007. 5 6. 7L. .
We just got home from a 6000 mile tour of 23 states. From central NC to Cheyenne, Estes Park, Penrose, Gunnison, Moab, Gallup, Painted Desert, Albuquerque, Amarillo, Oklahoma City, Wichita, Cape Girardeau, Bowling Green & Marion, NC.
I installed the MP8 at home before we left. Half way up a hill in West Virginia in 5th gear pulling hard at 23k the engine kicked a code. “Low fuel line pressure”. Drove into dealer in Louisville and they told me the code. Reset computer. Drove to Estes Park & removed MP8. Average fuel mileage to that point was about mid 9s. I get mid 11s around NC towing with no MP8.
Drove to Penrose, CO. Loaded truck bed with large size CO. red rock. From that point I was grossing 26,440#s. From that point to TS Performance, Bowling Green, KY. I still averaged mid 9s even with extra load of stone.
Walked inside TS Performance and met both Chris and Dennis. They were very helpful. The replaced the module & wiring harness. This did not help my mileage. On over into TN. Engine kicked another code in a hard pull. Same low fuel code.
We just got home from a 6000 mile tour of 23 states. From central NC to Cheyenne, Estes Park, Penrose, Gunnison, Moab, Gallup, Painted Desert, Albuquerque, Amarillo, Oklahoma City, Wichita, Cape Girardeau, Bowling Green & Marion, NC.
I installed the MP8 at home before we left. Half way up a hill in West Virginia in 5th gear pulling hard at 23k the engine kicked a code. “Low fuel line pressure”. Drove into dealer in Louisville and they told me the code. Reset computer. Drove to Estes Park & removed MP8. Average fuel mileage to that point was about mid 9s. I get mid 11s around NC towing with no MP8.
Drove to Penrose, CO. Loaded truck bed with large size CO. red rock. From that point I was grossing 26,440#s. From that point to TS Performance, Bowling Green, KY. I still averaged mid 9s even with extra load of stone.
Walked inside TS Performance and met both Chris and Dennis. They were very helpful. The replaced the module & wiring harness. This did not help my mileage. On over into TN. Engine kicked another code in a hard pull. Same low fuel code.
