My 99 7.3 ran fine this morning. I got home and let it sit for about 2hrs and then when I went to start it, it idled rough and if I gave it any throttle while idling blew some white smoke. I thought it would smooth out so I backed out and once on the street I tried going and it sputtered really bad and wouldn't go anywhere and finally died. First thought was CPS so I replaced that and nothing. Checked all fuses. Replaced fuel filter and added some additive in case something was clogged. It cranks over just fine and the tach moves while cranking. Up until the last few times I tried, it would blow white smoke, so it was getting fuel just not burning it. So I was thinking glow plug relay but all of the parts stores are closed so I have to wait until tomorrow. But the last few times I tried cranking it, it still cranks fine but the tach doesn't move as much and no smoke out the exhaust. Any help would be appreciated.