2014 6.7 CP4 anyone have experience?

[CarterKraft]

Boost looks great, at least the gauge responds just like it used to. No problem building boost.

But typical diesel fashion it takes fuel to make power and I am certainly not putting the same amount of fuel to it.

My tuner has 5 canned fuel settings. I should probably try to up it some and see what happens. I just think the pump is not meeting spec.

If the rail is dropping like that wouldn't you get a low rail press code?

 

[Tiha]

If the rail is dropping like that wouldn't you get a low rail press code?

That is what I need to test and read on forscan.

I suspect if I did a hard run the ecm will be calling for 29k psi or something ungodly like that but the pump will only be building 20k psi.

Just a theory,

Low pressure code is like total loss of pressure. Like under 52 psi for a minute on the low rail.

More than anything i wonder, does nobody else ever have this problem? Not running the same after fuel system swap? Do they just ignore it? Do they not remember what it was like?
Maybe I am the only one.

Really there is so little information out there. No like the old 7.3, 6.0 or 6.4 you can find tons and tons of info.

 

[arse_sidewards]

Really there is so little information out there. No like the old 7.3, 6.0 or 6.4 you can find tons and tons of info.

These trucks are new enough and are expensive enough that anyone who can get their dick beaters on one is rich enough to have the options of a) trade it in toward something else if it has unresolved issues and they think it's a time bomb b) paying the dealer to fire the parts cannon that the dealer already wanted to fire anyway to cover their butts. Naturally in depth troubleshooting info on forums is going to be pretty scant because this leads to a smaller proportion of owners are working through issues themselves.