I got a 1999 Ford F450 with 7.3 powerstroke diesel engine. Last wed. i just start my truck and check engine came on. I driving without problems. Next Day i start again the truck and the check engine still on, but truck start as usually., when i finished taking out the snow from my truck, the engine shot off without reazon, then i start again the truck , Start but after i went out of the truck , the engine shut off. then i start again the truck and start good but quickly shut off. I change fuel filter, IPR , Cam Sensor, New Batteries. Fuel Pump, And nothing, still the same. Today i just change the glow plugs , and still wont start. Any Ideas?>?? Im desesperate,..

 

Without getting into great details , one of the most important things to check is the condition of the oil. The injectors require good oil pressure to fire. You might check the level of the oil in the reservoir at the front of the engine. If it is empty try adding oil to it to fill it then replace the plug.Is it very cold where you have the truck? If so , you should be using 10W30 oil in it.
Also are you sure the glow plugs are getting power to operate? Check if the glow plug relay is working to provide power to the glow plugs when cold and for starting.