The vehicle is a Renault Espace 2.2 dci on a '02' plate, engine code G9T 722.
The vehicle came in running but it would cut out above 2500 rpm and the MIL lamp illuminated.
Fault codes retrieved using Autodiagnos were as follows:
313 - preheater plug circuit
1623 - Preheating relay circuit
B408 - thermoplunger relay no 1
A602 - preheater plugs circuit
9604 - preheater relay circuit
A980 - clutch switch info
9510 - boost pressure wastegate
1533 - Fuel pressure info
As a result of this we changed the fuel rail pressure sensor and the pressure regulator, this did not solve the problem, all of these DTC's were clear and the engine run again and the DTC retrieved again, however the only code remaining was B408 Thermoplunger relay no 1.
On closer inspection fuel had been blowing back pass the copper washer of the injectors and coked around the injector body. All four injectors have now been replaced and this problem rectified.
However the problem now seems to be worse as the vehicle will start but cut or idle for a few minutes and cut out with out on its own. Fuel pressure seems to be within the expected values but the tank pump does seem to be noisey. We have connected a pressure gauge and observed the live data using the scan tool but the pressure does not appear to decrease dramatically when the vehicle stalls.
The only remaining fault code at the moment is B408 thermoplundger relay no1.
So what I really need to know is does anybody know of any common faults that may cause this or could even suggest possible causes for these symptoms or fault codes. Any help at all at this point would be appreciated as we do not seem to be able to solve this one and autodata doesn’t have any wiring diagrams or anything that could help us.
I also have a Vauxhall Movano with the same engine with a non start condition that we need some help with, but I will post this as a separate problem.