Hi, I have a 2004 F-350 with 6.0L Powerstroke. A couple of days ago I noticed a continuous grey smoke coming from the exhaust (smells really rich). It does it all the time but get etremely bad when I first take off or after letting off on the pedal and accelerating again.(while driving at a constant speed the smoke seams to almost go away). Just before I noticed the grey smoke the heat in my truck quit working at idle but would warm again at load. So I checked my coolant level and it was down about a gallon (3.5 to 4 litres I'm Canadian)
I topped it up and a day or two later the grey smoke started. the oil level is fine and the coolant has not dropped again and has no signs of oil in it ( that I can tell anyways). Truck runs and idles perfect. The only thing I noticed that would be different is the really cold starts below 0 F and -20 C(again Canadian) the truck seems to start and run alot quiter when cold than it did before.
Any help would be appreciated.