1999 Dodge diesel truck hard to start

Is your check engine light on n can you drive it to autozone get free diag I need to know what codes r store in your PCM sounds to me like crank sensor it fires your injector n coils but to be on the safe side give me the codes ok good like

Hi Thomas:
Sounds like it's not getting fuel right away.
I'd be checking the choke, and also perhaps try priming by pushing gas pedal all the way down twice, spin over 2 or 3 seconds, then pump gas pedal twice again, then try to start.
None of this is valid if it is a diesel.

I saw what you replaced, didn't see any testing? What testing have you done? Make sure battery has a full charge?
When the problem is ongoing, have a helper crank it, while you check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure. Also, check fuel injector pulse. Any applicable trouble codes?
If you have the spider fuel system, that system is noted for problems.

You may be having an intermittent failure with the fuel pressure regulator - checking the fuel pressure when the truck won't start may pinpoint this problem. If the pressure looks OK, this same problem can be caused by the ignition system as well (ignition coil or control module).

Have you checked fuel pressure before and after cranking the engine ?

Well, This sounds more like the starter may need a rebuild than anything else....The symptoms are there! The loud clicking is the solenoid (normal), and it should turn the engine over and crank at that point without you hearing the clicking. Since it does not crank, all you hear is the clicking..
There is an old "red neck" trick that could define your problem...When it just gives you "part one" and doesn't turn the engine over - STOP - NOW..crawl under the truck and try several taps on the starter frame ( NOT ON THE ROUND HOUSING ) with a metal hammer, now see if it starts right up...if this works, then the starter brushes are on their last bit of contact...AND this usually only works once or twice then its time for a rebuild...(don't ask how I know this works!!)
..If this works for you, then you have diagnosed your issue. Even if it doesn't work, my money is still on the starter!! Good luck...

the car cranking over has nothing to do with the fuel pump
The car will crank all day(with a good battery and no fuel pump
If the cranks one time and then quits you need to be looking at the starting system NOT fuel system

the best advice i can give you is bring it into a warm garage and let it heat up, then treat your fuel with anti gel solution run it through your injectors by running engine and this should not happen again, seems like your lines are gelled up and you don't have proper pressure.

some models dont run when the key is turned on,but when the engine cranks the fuel pump starts running,

no
get a second opinion from an accredited diesel specialist repairer shop