Was driveing this F 250 power stroke and it stoped just like you turn the key off. Will crank over but will not fire . Where would you start to look for this problem. thanks Don

 

Do a search for "cam position sensor"... might be the culprit here.

 

cam sensor for sure! Well atleast thats where I would start. Does the tach move while cranking it? if not is a cam sensor

 

Thread moved to engine forum. But I think these guys already nailed it

 

If the tach moves while cranking check the #22 under hood fuse. If your fuel heater shorts out, it blows this fuse, and this fuse powers the PCM. If it is blow, unplug the fuel heater at the fuel filter housing an replace the fuse.