I have a strange issue with this cummins. The complaint I have is lacks power on hard accel. Code I have is 0559
I've noticed that the commanded fuel pressure when WOT is around 23000psi and actual is 13500psi. If I cycle the key off to on the fuel pressure is fine until i go WOT then the pressure drops again. Cycle the key off to on, it's fine. Problem only occurs when I go WOT. Any help is greatly appreciated. Thanks
Chris