Wrangler 2007 27lt. diesel hard to start when engine already warmed up

i have a serious problem with my jeep wrangler 2007 27lt. diesel. At morning when i start the car for first time its working fine, start at 4 cranks , but when the engine works and its hot if i turn off the car and start again it take 8 up to 20 cranks to start if its start . I change the fuel tank complete , fuel filter , i check all the sensors , the engine heaters , fuel injectors , battery.
Not any codes at the diagnostic or lamps turn on, on the dash .
Any one who have the same problem or any ideas?
Thanks

 

Thanks.Today i change and the CAMSHAFT SENSOR but didn't work.. The next i will check is CRANKSHAFT POSITION SENSOR. It is the last sensor..after that i don't know what else can i do.

 

Welcomemto the forum @sylvestros289 . Any fix as of yet?

 

no not fix yet and there no any codes.