C12 issue

Have a 2000 Freightliner with a c12 and 8ll starting up its sputtering and blowing white smoke at startup, it goes away after a few minutes and idles normal. The truck runs fine after starting up, and pulls great under a load, it only misses or sputters at startup and sometimes when going through the gears at 1200-1400 rpm only when cold then it’s fine again. Did injectors,fuel pump, coolant temp sensor,ambient air temp sensor, doesn’t use drop of coolant or oil did cylinder cut out test 4 times and “passed that” injectors made it smoke a little more at start up, any suggestions because I’m out of luck.

 

I can take one but doesn’t use a drop of coolant