Hello,
scott, a good place to start on diagnosing a no start is the cam sensor and then high pressure oil pressure. The quick dirty test on the cam sensor is to verify the tach comes up when cranking. Your looking for a few hundred rpms. An occasional twitch doesn't cut it. If you have a good scan tool look at the cam sensor signal when cranking. It should come up and and keep giving a signal as long as you crank. any dips or dead spots and its the cam sensor. They are now cheap enough that just swapping it for a new one is a valid test. It it still wont start at least you have a spare for when you need one.
The next test is the hi pressure oil. key on not cranking it should read none. If it reads a bunch of pressure I'd suspect the hi pressure oil pressure sensor. Its on the front top of the drivers side head. Once you start cranking you should see at least 600 psi but more like 1,000 psi oil pressure to get it to fire off. If the oil pressure comes up and is low suspect bad injection control pressure regulator. It screws into the back of the high pressure oil pump. It could also be injector "o" rings are bad but I'm not sure how to test to determine which it is with out it running. By this point you should have found your no start problem.
Another test if you suspect a bad hi pressure oil pressure sensor is to unplug the sensor and see if it runs then. With out the sensor it will guess on an IPR value and run that way. If you get it running look at IPR duty cycle and pressure. At idle you should see ball park 1,000 psi and low teens for duty cycle. If pressure is low or duty cycle is way high possible bad IPR valve or bad injector "o" rings. If it runs try and go for a drive and see what oil pressure and IPR duty cycle values are. You should get up to 3,000 Psi and duty cycles of ~60% maybe. you should not see 100%. If pressure is low and duty cycle is way high it probably need injector "o" rings.
One last thing that I almost for got, a good scanner will be able to do a buzz test. Perform a buzz test, it test both the injector coils them selves and the IDM. This is the only way to retrieve IDM codes.
This should at least get you going on finding your problem. If you have any more questions let me know.
For more help go here. linkey:
http://www.thedieselstop.com/
Bullittman