No oil flow
Vehicle came into my shop as a no start. Truck was running then died and would not re-start. We found no oil flow to the oil filter housing. Truck does have correct filter and cap, we have previously replaced HPOP, all Injector 0-rings and oil tubes and dummy plugs. Truck ran great for a month after HPOP replacement. Now no start and no oil flow. LPOP looks good no needle bearings present and no scaring on pump gears, pump cover does have minor scaring. Dropped pan pick up tube ok and o-ring is a little flattened out but I do not believe enough to cause major leak. Any ideas on what to check next would be appreciated.