Well, after some time and some parts swapping, she's running almost like normal. New VP44, new OEM APPS, and a complete check over of grounds and all wiring. It just doesn't have enough power- struggling to pull loads up hills...no codes though. After 268,000 miles could it be that the injectors are dirty/clogged? I don't have a boost guage (yet), and fuel pressure if great, any suggestions?