06 5.9 no power going down road now will not stay running engine surging
 

I am getting a po148 code. Truck will not get over 2000 rpm intermittently. Now I've changed fuel filter fca and cascade valve. Still same thing. I did change the #5 high pressure line before this started I have no programmers on it just a stock truck. It blows black smoke like no tomorrow. All injectors have checked good.

Check for a boost leak. Check for fuel delivery "Lift Pump" Check CP3 "Unplug FCA" What does it do? Plug it back in Recovery time is?

Ok I went thru and tightened all injector tubes truck runs like new thanks for ur help. Still throwing a code going to check tomorrow to see what it's throwing now. If it's not one thing it's another