Hey guys, been a while since I was here, but knew where to come to for the best help. I'm looking for help on a oil pressure loss problem. I've got a 7.3 idi with less than a 1000 miles on it since a complete overhaul. .040 bore, new cam and cam bearings, new rod and main bearings, new oil pump. Last week I was about 5 miles from home and the engine light came on and oil pressure hits rock bottom. I stopped checked the oil was showing just barely under the full mark. I got back in the truck and started it, no knocking and the oil pressure was showing normal again. As soon as I cracked the throttle one time, pressure hits bottom again. I changed the sending unit but still same thing. I replaced the sending unit with a mechanical gauge, and showing nothing. Any ideas or help as to what the problem may be, would be greatly appreciated. Thanks in advance.