Originally Posted by 05edge
Did it have this issue before the rebuild? If not how long has this been happening? Make sure your replacing all these sensors with oem. After market sensors never last and half the time don't work right. Yes there's a little blow by oil in the intake but it shouldn't be much. Check the timing as well. Maybe it never got set right after the rebuild.
I think it sounds like a timing issue myself. Similar symptoms to a friends truck which turns out to have the timing screwed up.