2350 intermittent fuel pressure issues

[8pitcher]

Hey got a 2014 Isx 15
A few details (in miles)
20k on rebuild
19k on new turbo
17k on delete
15 miles on high pressure fuel pump
Intermittent 559 code fuel pressure metering valid but above normal operating range moderately severe level
This code occurs when I’m demanding full fuel or when I hit a hill

I replaced the injectors when I rebuilt the motor. I’ve done all the work myself.

The 559 code started being very intermittent after thanksgiving. But was only temperature related. Only would occur when the engine was cold below 30°

Fuel filters have been replaced.

Yesterday I was checking to make sure the injector hold downs were tight and injectors were seated which they were. But the tops of the injectors had melted. Unsure on why that is. But hope that’s the cause of my issue. All injectors except for cylinder 5 were melted. Thoughts anyone?