Turning Over But Not Firing?!!
 

My 2004 F350 Powerstroke 6.0L keeps turning over but won't start.
We hooked up a diagnostics reader to it and it told us "Camshaft Position Signal Output Circuit/Open" so we replaced the camshaft with a new one, still keeps turning over and won't start :argh: Rehooked the diagnostics reader to it and it's just giving us the ?-yellow light meaning "Indicates there is a possible problem. A “Pending” DTC is present and/or some of the vehicle's emission monitors have not run their diagnostic testing." but no code.
What else should we look at or try?

Oh & it hasn't had any problems. Started up fine, wife drove it into town, parked and went into an appointment, came back out about an hour later & it wouldn't start.

Check oil pressure and ficm volts.