2007 D13, cranks but won't start

I was hoping some of my fellow wrenchman can help, I have a Volvo with a D13 engine that cranks over but will not start unless I use a small amount of starting fluid. After that everything works fine. Once I turn it off and then try to immediately turn it back on the same thing happens. My customer wanted me to replace the coppers and the injector o-rings thinking this will solve the problem and it did not. Also, no check engine light or warning light, any suggestions?

 

james, you before cranking?

 

Let me check,

 

The dash lights up like normal. Before cranking no the STOP light does not illuminate, I do remember after installing the injectors and putting everything back together the truck responded fine.

 

Yes, staying running at idle and running while using the PTO to increase RPM's