Just bought this beast with 200k and it was extremely hard to start and had no power. I Resealed leaking hpop, new ipr, new feed hoses with no check valves. New starter, good batteries. Installed new cps due to no tach at crank, still no tach. Wiring is good from engine harness no cps. Previous owner told me they got a code for injectors 1 and 3 so I replaced the vc gaskets and connectors to rule that out. Glow plugs all ohmed around .6 ohms and I did replace the bad GP relay. I have 1800+psi at ICP while cranking and truck acts like it wants to start but it won't. White smoke out of exhaust and fuel bowl is pressurized but I don't have an actual psi yet. (Fitting is en route). Now I have a consistent code for injectors 1 and 8 being low but they all sound off during buzz test. What's my next move? Will 1 or 2 injectors being bad keep it from starting? Or am I missing something else? What's my next step?