K12 cdi engine cutout mystery!!

[WayneB]

Hey guys. I bought a 2008 K12 cdi from someone that I trusted however found much more faulty with the lovely little car than told about. The latest problem has the most experienced diesel mechanics baffled. The engine cuts off after about 1 and a half minutes. Restart no problem, then again cuts out and so on. Every 1 and a half minutes. The only fault (that is left from the 10 initially) is a 'rail pressure' I think they said. Does anyone know what could be causing this? It really seems like an electrical issue somewhere. Please help!!

 

[WayneB]

Apologies, I meant dci...

 

[Alin2225]

Change the rail pressure sensor.
Now depends on what kind of injection you have.
Delphi?
What dci? 85hp?

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[WayneB]

Yes I think it is a 85hp.

 

[Alin2225]

1. Check the presence of air inside the fuel hoses.( If you see bubbles it's not ok)
2. Check the fuel return of the injectors.
3. With an obd device check the rail pressure with the engine running.


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[WayneB]

Hi Alin2225
There is no air in the hoses. The return on the injectors are equal and accurate and the OBD rail pressure check with engine running is 100%. So this has us stumped...