hello. i have a Skoda Octavia 3 Combi 2.0 TDI RS Diesel (184 HK / 135 KW CUNA).

with an error code p0087. it can stand idle for about 50 seconds after which it goes out.
have changed the fuel filter, fuel pump in the tank, both sensors on the fuel rail, 2 injectors which had a bit more back spill than the other 2. I have also tried to close the egr valve, without success.

have tried and dismantled the exhaust, if it could be the particle filter, without success

the high pressure pump delivers 320000kpa at idle

P0087 is a fuel rail pressure issue. 

 

Suggestions to look at:

Possible Solutions

• Check Measuring Values for Fuel Pressure
  • Check for bent/squeezed Fuel Lines
  • Check Low Fuel Pressure System for Leaks
  • Check Fuel Filter & Filter in Fuel Pump
  • Check the Fuel Quantity supplied by the Fuel Pump
  • Check for fuel pressure loss from leaking fuel injector
• Visual Inspection of Hardware (Camshaft, Cam Follower, ect)

 

Also check to make sure you don't have fuel contamination as that would also cause problems.  Look at testing the Fuel Rail Pressure via an analogue tester. 

 

When you changed the fuel pump, assumed you used a good quality part?  There is also a good image from Ross-Tech about high pressure pump failures: