Help 3.0TDI Commonrail - No Rail Pressure

Hello, we are slowly running out of options.

After replacing the high-pressure pump and cleaning all components of the electrical system, and changing the filters, the Touareg 3.0 TDI no longer has rail pressure. Only does the pressure increase to approximately 80 bar after a long start-up. The high-pressure pump and the pressure regulator on the rail are new. All E-valves from the fuel supply have been disconnected, and both rails have been closed at all connections and checked for pressure with a Condor pressure gauge. No pressure. Since our motor has 2 high-pressure connections, we were unable to measure the pressure in the HD pump (connections for testing were not present because the threads were larger than those on the rail).

Do you have any advice for me?
All connections on the D-filter are correct. Bleeding with VCDS without air bubbles has been completed. Return line is clear and diesel is being returned.

Hello,

I haven't done that yet, but I've already checked the simplest option? Hoses connections on the diesel filter not reversed and is it sealed and there is no air being sucked in anywhere?

Best regards, Rainer

Quote:

Because our motor has 2 high-pressure connections, we were unable to measure the pressure at the HD pump.

Then it is a Euro 5 engine with CP4.2 - this requires a pressure of 4 bar at the inlet. No template -> no rail print