Q5 TDI 3.0 won't start

[Javier Neog]

UPDATE!

Hi guys. Sorry about delay answering my own post. We have fixed the problem finally! First I must say, that the only pieces I needed to buy after using petrol were the whole injector set and the high pressure pump. That's all.

So, what was the problem? There is a piece that holds down the injector. I don't know the name but please look at the picture one. We installed incorrectly (picture 2) so there was a leak in the combustion chamber through the injectors. When installing it correctly (picture 3), there was so much pressure and the engine turned on. I am so happy now. Don't worry about the rust in the pictures. That one wasn't installed in my Q5. Last photo are the people who helped me.

Thank you for all your help

Javier

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[shabazmo]

Well done. It just goes to show that basic diagnostics starting with compression, ignition and fuel is very relevant today but I am unsure how you would test for compression with the injectors in place. How did you get to establishing that there was leakage past the injectors.