Truck won't start..

[jmartin48]

I'm new to the forums but in need of some help. I've got a 2006 6.0 powerstroke with about 114k on it. The truck started running awful and getting hard to crank around december with some blue smoke when it was cold. It would crank on warm day's but just sputter on cold day's. About 4 weeks ago it had died all together. Won't start at all. It sounds like the truck is starving for fuel so we replaced all the fuel filters dumped the water seperator and replaced the fuel pump. The truck fired up and ran like a top. Drove it around all afternoon and ran just fine. Next morning it's doing the same thing. Any suggestions would be much appreciated. I've done spent about 600 on this thing alrdy with fuel pump filters and 2 new batteries and still have nothing to show. Thanks in advance.. There is also no codes showing..

[rowcoach]

Check the high pressure oil side for leaks. If you don't have one already get an edge insight. This will help in finding the problem without throwing money at guesses. Mine did the same thing. It wound up being a bad stc fitting and 2 injectors with oil leaks.