High pressure rail 1 ???? Code 129

[Jloz1387]

Just recently bought a 2006 international with a isx 870
Truck runs fine but sometimes its revs high and ecm protects engine and shuts it off
Truck starts back on runs little rough smokes 1-2 min then back again normal
Code is 129 (got roadrelay)
Supecting of injector orings since diesel has black soot had a previous truck same problem it was orings
Previous owner put new timing/fuel actuators guessing he was trying to solve that same problem