1. Fuel in tank?
2. Fuel turned on? It's possible someone turned the vale under the tank off, not likely, but check everything...)
3. How cold is it? Are you running the preheater (holding the key in the warm-up postion several seconds) and are you flooring the accelerator for max fuel?
4. What shape is the battery & starter in, diesel needs a pretty fast spin to fire up, weak battery can prevent it from starting.
5. Often diesel with a weak battery, slow starter, or in cold temps is hard to start the first time if it sat a day or 2. It will start well the rest of the day. They like full fuel flow until they fireup, floor it.
As well, you may or may not have the little push in button on the injector pump. This is a cold starting aid, and _Really_ works well. Is the injector pump a flat in-line one? Where the throttle cable attaches, there is a little tiny pin sticking out, you can push it in - it should have a tiny rubber boot on it, many are lissing by now. If you have the kill knob 'on' and the throttle about 1/2 or more open, you can push this little pin in and it will stay in - only moves in a 1/4 inch or so. It dumps extra fuel into the system during starting. Not every Ford has this, can't remember what type a 6600 has.... Will help you.
There can be worse, $$$ problems causing a poor start, but I'd look to you just not being familiar with starting diesel, a weak starter or battery, or it being cold and you're not using the cold-start features before looking for the 'engine is worn out' issues.....
--->Paul
