Hard start then no start
I have a 04 6.0 cc swb 4x4. The only modifications to the truck are a sct running spartan tunes. Oil is changed every 5k and was changed thursday. Fuel filters are changed at around 15k intervals and were changed sunday. Now to the problem. I went to get in the truck and go eat lunch yester day and afte the glow plug light went off I tried to turn the truck on and it would stumble but not fully start. After probably 3-10 minutes of trying to get it to start it finally started but was running extremely rough and wouldn't go above 1000rpms and was. Pouring black smoke like crazy..... It did this for a minute or less then started running like normal. The rest of the day truck started very easy no issue. Then this morning truck didn't want to start again. When I checked for dtc with the sct it said there were none. I'm not driving the truck today and I'm stuck at the hospital.... Does anyone have a direction to shoot me to resolve the hard start problem?