I fail to lower the Renault Master butt!

It has happened to me three times, when the cylinder heads down the vehicle does not turn on again. I wanted to know if someone could collaborate about what can be presenting!

Do you change the together? Do you press the screws with a dynamometric key and your pressure? Do you bleed the injectors? When you take out the injectors you leave them soaked in fuel so that they do not dry out and are glued?, could you put what steps you do and so we could tell you if you do something wrong or something fails.

Yes, I have taken all the right steps as the manual says. The only thing is that it has only happened to me with this type of vehicle, 3 times and the latter put the diagnostic equipment and only showed me in the UCH, connection impact information. I changed the impact sensor for a new one and nothing, the installation measured it, continuity to already positive dough and there was no short. Finally I tried passing the ECU, UCH and the contact key to a good car and in that one did not give a breakdown in the UCH and therefore ignited the engine. Then I made the steps that the manual shows when you have this fault code and the failure can be on the multiplexed network I do not know, I simply had no electrical schemes to test.

What year is the van and what engine does it carry? And has it had a blow? If it is suddenly you can have activated (if it carries it, that not all take it) the impact switch, which is that red boton that goes in the engine, you can press it and try. I also tell you that if in some modern Renault models if the airbag unit is wearing a block signal to the motor preventing the start of it. I hope it helps you.

It is from 2012 and has a G9U engine, it has not had a blow but, in the Renault it took 30 days to turn on the last one that took and this does not know how much they take. Every time this procedure is performed, the engine cannot be turned on.