Throttle issues and shutting down
What yall my names luke and I have a 1996 c2500 2wd with the 6.5 with 280000 miles in it and she ran great forever and just recently she has been giving me this problem when I'm around 65, 70 mph she starts to shutter and try to cut out then I lose pedal response and she shuts down takes about ten minutes to get started then finally starts idles super rough then shuts down again then will finally start again and run ok I guess with some spuddering. I had the injector pump rebuilt about two years ago could it be the pmd again I'm just not sure i have been told that a bad oil pressure switch can cause issues like this tooShe threw one code and said it was the boost solenoid so j replaced that the map sensor the fuel filter and bought a new pedal assembly with sensor and new lift pump and injectors I have installed all the sensors up top and the fuel filter but havent installed the pedal assembly the injectors or the lift pump I'm just curious if anyone would know what's going on and if I have just wasted money on all of this but keep in mind the injectors are original and so is the lift pump and the pedal assembly this is my daily and my only mode of transportation any help would be appreciated.