The Diesel and I...

I've been working on this '96 Dodge Ram 2500 Diesel (5.9L Cummins, Automatic 47RE, 4x4 NP241). It's got a lack of power issue.. at 1900-2000rpm, the truck seems to run into the proverbial 'brick wall'.. I tell you, in the past week or so, I've dramatically increased my diesel engine knowledge. I'll modify this post in the next day or so, to bring you all up to speed as to what's been done, thusfar, and what I'm gonna try next. It's very weak.. Like 1984 Honda Accord automatic weak.. The Honda would probably whip it's ass in any type of race, in it's current status. Sad, really...