08" Ford F-350 diesel no start.

Cylinder not firing
Check plugs

There is a cylnder coil for each cylinder prob failed
Check obd code

Other likely causes are:
Spark Plugs and Wires
Fuel Injectors
Internal Engine Problems such as Low Compression, etc.
Less Common Causes
Faulty Computer
Coil or Coil Packs
Crank or Cam sensors or reluctor wheels
Faulty O2 (Oxygen) Sensors

check engine immobiliser and crank position sensor . Run fault codes and replace faulty units.

what year is it? it could be a sensor off from the belt braking. like the cam of crank sensor. or maybe even the high pressure oil pump.

Does your "wait to start light come on"? If not check fuse#22 under the hood. If it is blown it is most likely your fuel heater inside fuel canister. Unplug the wire on drivers side of fuel canister, replace the 30 amp fuse and try to start. I hope that helps!

Hm. it's a Diesel. So, it uses glow plugs.
Diesel engines work on the principle of exploding diesel fuel vs. burning gasoline fuel.

If it is spitting and sputtering, there is a possible problem with the fuel that is in the tank.

You see, Diesel fuel, according to Wikipedia, changes its formula drastically from winter to summer to work best in winter or summer climates.

I would drain the Diesel out of the tank and replace with fresh Diesel from your local Diesel Fueling station.

If this doesn't work, then, you may have a sensor gone awry or a compression issue.

Good luck on this one.

Have you tried removing the chip, reseting the pcm, then test drive without the chip, I do not work on diesels but I know I have had some 5.0s with compatibility problems with performance chips, for some reason on select cars the emissions system would through a fit and make the car run like crud with the chip in ran fine with it out although they accused it ran fine for a few months with the chip. if you havent you might try this just to see

How many miles on this truck?
You maybe having an issue with your injector pump or the controller.

Not a problem that very many people have the ability to solve at home

IF WE TALKING DIESEL.YOU COULD HAVE A RESTRICTED AIR INTAKE.AIR LEAKS IN SUCTION LINES.LOW IDLE SPEED.AND A DEFECTIVE INJECTION PUMP.

Have you changed your oil? Rotella 15W-40. These engines really don't like old oil. It becomes too thick for the injection pump to work correctly. Another possibility is a bad cam sensor on the front of the motor. Most engines call this the crank sensor but on this engine you have to look it up as a cam sensor.

Have the Cam Position Sensor changed. Ford has a recall to replace it to the new style. Typically the CPS does not cause an intermittent problem b ut mine did the same and stopped once the CPS was changed. If Ford will not fix it the new sensor is around $20-25.