The last time the truck ran it only ran on 4 cylinders, won't accept throttle and blows white smoke. Now the truck doesn't run at all. Truck has been to Ford, shows no codes, has new injectors and FICM oil rail plugs and stand pipes 0 miles. HPOP icp checks out, fuel pressure at each cylinder head is good, truck has ARP head studs, no change in coolant level, all diagnostic tests that Ford has have been done. Compression has been tested and well within spec. Engine has approx 68,000 miles and also has an EGR delete kit. Ford has been no help. Also had truck at a diesel performance shop. They spent 30 hours running diagnostics with no luck. Has anyone run into this situation? Need help, truck hasn't run in almost a year.