Hey guys, trying to root out what I think is a problem with my 7.3, I think my truck is running rich, it doesn't smoke other than on start up it chugs a gray haze till its warm. I heard through the grape vine that a previous owner had turned the fuel up at some point in time then turned it back down because he didn't have a pyro and was afraid of hurting the engine. However I want to check the adjustment and make sure its set to factory specs. I think it is still turned up some or I have a problem elsewhere because the truck seems to be running very rich, when you stand by the exaust while the engine is running it literally burns your eyes and nose. I get good fuel milage though, just under 15MPG according to my rough calculations, I assume that is pretty good for an extended cab f250 with dual wheels and a dump bed. Just trying to get to the bottom of my horrible exaust fumes and possibly even get better fuel milage. I have a rough idea of how to adjust fuel but where is the window I need to open to get to the screw? And how do I set it to factory specs? Any other things that could cause my exaust fumes to burn my eyes and nose like that? I just don't feel like its normal but I've been told all these old idis are like that. Thanks guys.