Hello,
I have a 2012 Dodge 3500 6.7 Lonestar edition. I recently deleted my EGR and cleaned out my exhaust and put a H&S tunner on. recently went to the track and did test on my truck in a quarter mile. by the end of the quarter mile I had no more fuel pressure on my lines. Do I need a airdog fuel pump or is there something wrong with the H&S tunner?

 

Were you draining the rail or were you losing pressure to the CP3? Fuel Lab is a much better pump. Take a look at them before you buy.

 

Well I had a check engine light that can on. It was a low fuel pressure in the fuel rail. But then someone told me that it could it have been air in the line. Ill check out the Fuel Lab.