Thank you for the reply!
I'm going to pickup some 1/2 clear tubing and look into setting the rail pressure at idle to 21000 psi. Need to figure out where to command that in autoenginuty cant be to hard to do im sure.
The truck throws the code every time you put the pedal to the floor and make it try to take off. If you try this from a dead stop on a steep grade the truck just sits in place wont move or build rail pressure.
I ran the injector balance test on all 8. They all showed between + or - 2. It sits and idles perfectly not much smoke from tailpipe ever. A friend also told me try to run the contribution test on the injectors.
Will keep you posted...