Inter DT444 engine

Hello friends, I have a problem with an inter DT444, 7.3L, 7.3l
The detail is that 2 damaged injectors were diagnosed to change them but when the new ones were installed no longer started and See has reviewed everything n n e electronical fault is already put the Scaner. If someone save please give me a little hand of what can be the problem in this engine

Greetings Henry,
I am a technical advisor, specialized in international trucks for more than 20 years, I know these engines well.
I recommend that you verify 3 things:
1. That when the boot voltage of the batteries is not less than 7volts. This can be seen with a multimeter connected directly to batteries.
2. They must verify that there are revolutions, it requires minimum 130 rpm to start.
3. This engine uses a high injection pressure pump. It should be verified that at the time of starting, 500 PSI of pressure is minimal.

I enclose the procedure recommended by factory for these cases of "not starter's start"

Table 2.11 est tool-data list from Form Eged-195
• Select and Enter Following data as The First Three Lines In A Custom Data List
• Monitor The Data While Cranking The Engine for 20 Seconds Minimum
Data Specification Current
Battery Voltage 7 Voltge 7 Volts Min.
ENGINE RPM 130 RPM Min.
ICP Pressure 800 psi min.
If voltage is low, proceed to test 9a.
If no rpm is notted, reheck fault codes and proceeding to test 9b.
IFP Pressure is low, referring to diagnosis Publication EGES-190 for System Leakage Tests

Note: By symptoms it seems that the problem is in the pressure of injection oil that is not increasing, the probable cause can be the stamps of the injectors.