Opel Astra H 1.7 CDTI

Problems with Opel Astra
Good
I have a problem with an Opel Astra the car goes perfect when he wants and when he wants to hit and he stops once he has stopped no longer starts a good time.
I have connected 3 different diagnosis machines and they all tell me the same without seeing, I have checked all the diesel pipes in case it takes air for some and nothing, I have disassembled the fuse box that goes in the motor bath and I have cleaned the connections (since I found some with start problems and came from said connections), and nothing remains the same, I am thinking that I could be the flyer. Read
​
​

Good day,
first of all, we must locate the problem when the car goes out Czech if it is a spark or it is gasoline what is missing if it is a spark is the crankshaft sensor if
it is gasoline we have a pulse fuel pressure on the injectors if this is present when you fail you
verify the purple colored relays are the ones that control the ECM I
see you soon

Thank you
I keep you imformed of tests that you make ...
greetings