Fiat ducato refuse to start
 

Hello everyone I hope you're doing well.
I have fiat ducato 2.2 Jtd 140hp, equiped with DELPHI CMM DCM7.1B CEMO 26D3 ,
the engine refuse to start and sometimes when it's start he run perfectly but he return to refuse to start without any DTC's , I changed the injectors and the high pressure fuel pump, I checked all the circuit fuel, all harness and the real data everything is ok,
can anyone who has experience with fiat and Peugeot véhicule Help me to solve this problem.
Best regards.