Ok guys, heres the problem, check engine is on, no power. Fuel pressure at Air dogg is normal. Cp3 at rail is good at 26333. Cold air is clean and all boost tubes are intact. WTH? Is ECM stuck in some kind of power regiment?

 

tell us more about the truck also about the "limp mode" that its in, will it only turn 2000 rpm? if so what kind of tuner do you have on it? and is the rail shimed?

 

What are the engine codes?