Truck stalls sometimes
 

Sorry if this is kinda long. I purchased some RV275 injectors back in September of 2010. Ever since then i have had this problem of my truck trying to stall(and sometimes it does) or start loping when I put it into drive. I was reading a few post in the forums, and some people say that this happens to some trucks because the pop pressures may not be right. The injectors run great and i have no hard start problems. I have also recently installed a new transmission and the problem is still there, so I know it has nothing to do with that. What are yalls thoughts?
Thanks