humbert

I am new at this forum. I really need help on my Ram 3500 1 ton. It is a 2001 pretty much all factory. It is giving me a p0234 overboost condition, p0122, and p0500 along with the p1693. The truck has a new lift pump and injection pump. I have put a new cram shaft sensor( WOW) and a AIT sensor. This has gone off and on for some time, however this last time it wont go away. The truck hickups at 1500 RPMs and wont stop at all at any point unless at an idle. Where shouid I look next?