Hi guys, I have a 1983 D50 with the 4d55. recently replaced the timing belt, balance shaft belt, both adjuster pulleys, alternator, and glow plugs. also adjusted the valves.

The truck runs great, but starts rough in the mornings. I let the glow plugs go for about 5-7 seconds, then crank it. It fires right up, but then either dies or runs very rough. It sounds like maybe there’s a cylinder or two not firing, and there’s plenty of white smoke coming from the exhaust. Once warmed up, it idles perfectly with no smoke.
I know it’s an old diesel, but it seems like it should be starting easier in 70 degree weather. Could it be an injector timing issue?