My boss just bought an 06 f350 with the 6.0 and it always starts hard in the mornings. I have a 99 f350 with a 7.3 and when it was doing that I replaced the glow plug relay and fixed it. Does the 6.0 have the same type of glow plug circuit as the 7.3? Any help would be appreciated. Thanks.

 

tell him to run a 5-40 synthetic oil in the winter and use a good fuel additive and it will star great!