The diesel fuel is not reaching the injectors.

[VWDaveBMW]

Greetings everyone, I recently obtained a stunning 2004 730LD, which was purchased with a diesel leak in the return pipes from the injectors. After several injectors and new return pipes were damaged, we uncovered that the flow from the tank was incorrectly connected to the return line and vice versa. The pipes have been properly installed and bled to the engine's pump, yet diesel fails to transfer from the pump to the injectors; I have loosened one injector, but there is no diesel emerging. What actions should I take at this moment, please? 🙏

[VWDaveBMW]

https://www.amazon.co.uk/dp/B0DKJK869T?ascsubtag=v1-a484af-605641-0b203c464b-d&rel=nofollow&ar_srct=T1H

[p00rmansp0rsche]

Was it operational when you possessed it? It requires a period of cranking before the rail is bled and reaches optimal pressure; leave one easily accessible fuel line slightly loose and crank the engine, taking precautions as diesel may spray, so don safety goggles. Is the high-pressure pump control valve, rail pressure sensor, and regulator functioning properly?

[Screwdriver_1]

Are there any error codes? or alerts on the dashboard.

[dave783]

Allow one or two pipes to remain unsecured and tow the vehicle; I understand it is automatic, but if you accelerate beyond 30 mph, it may attempt to start. Once it does, tighten the pipes, and you will be ready to proceed.