Fuel rail pressures and questions, diagnosing help.

C.bowles2

2005 lly duramax
Nov 16, 2013
489
0
16
Ohio
I need help diagnosing. I have an edge cts juice with attitude. I like it but it seems to fall when the truck shifts or maybe right before, it really lacks. I'm wondering if this is the de-fuel setting or not. I have the edge set to de-fuel only on 4-5 locked shift. I know stock it de-fuels too. So anyway my fuel rail pressure seems good toping out at around 22k psi. Could it be the fprv? Also does the cts give an accurate reading of rail pressure? Or maybe I need a lift pump. Any ideas.


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