cold start is very difficult. have to let it warm up 10-15 minutes until it reaches operating temperature. last couple days it is taking longer to start. is there some module that may have failed. i have been told it is an injector problem. i have replaced oil, oil filter, diesel filters.

 

hey i had the same prob with my truck i changed the glow plugs and the glow plug module and fuel fitler and oil nothing fix it what the problem was is the fuel injector control module u can check it ur self to see if it good or not just look up how and check if it is bad send it to get repaired it will save u alot of money in the end

 

i would have to say the FICM is going bad, my friend had the same problem with his 6.0

 

this is what my truck did so if its the same thing its ur fuel injestor control module whenit started to get cold out it was harder and harder to start and when it did there was alot of black smoke and when i started to drive i hit right around 2000rpms and it felt like it lost power until it got to normal running temp then ran find my mpg went way do to i have 33 on 18in rims when first got the truck i was getting around 19 then it drop to 14 to 15 brought my truck in they told me it was ficm they wanted $989 to replace and reprogram the new one found a guy that rebuilds them he had a monthly special cost me 40 in gas to drive there and 110 for him to fix it my truck runs great getting about 23mpg know so if this sounds like your problem i bet its the ficm that guy has his own web site it is www.speedometerrepairguy.com phone number is 507-429-4489 his name is david he will tell u what to do with shipping and handling and he warrantys it for life its worth the money i really hope i help you guys out with the same problem like i was saying the is a way you can check it yourself to see if the part is bad just do alittle research i couldnt find anyone that had a solution for the problem alot of people been having so i figure ill help if i find out so i did let me know if i helped thanks