I got my van out on the road yesterday after double checking the timing (which i thought to be causing this problem), and the problem still occurs. Only happens under load. At idle to 1/4 throttle, the engine runs smooth. When i reach 1/4 to about 1/2, 3/4 throttle it chugs bad, acts like it's missing/got no power. I can muscle it through if i give it closer to full throttle, and it'll come out of it and runs pretty well. Under no load, it runs smoothly. The suggestions that have been given to me already are disconnect the EGR, that it might be hanging open or dumping too much; or that it could be a problem with the map sensor. I probably won't have time or good weather to work on it until this weekend, so wanted to see what other suggestions were there before I got into it. I will be double checking all of my vacuum lines as well, and am going to try and datalog/pull codes if i can get WinALDL configured properly.