Volvo FC2924C showing "Warning: Turn off engine. Engine error."

[Jinajon]

Thought I'd post a final follow-up:

After replacing the injectors, the rail pressure stopped fluctuating wildly, but it still varied more than I expected. However, the fault did not reoccur, and the machine operated flawlessly, so I declared the problem solved and moved on.

After about a hundred hours, the fault reoccured. Armed with the info from the gurus here, I replaced the next most likely item: the fuel pressure control valve/solenoid. (We had previously tested this component and it appeared to operate fine.) Once the brand new Bosch 0928400670 FCV was fitted, the problem resolved immediately, and notably; the fuel rail fluctuations ceased. (Obviously the rail pressure did alter, but exactly as expected for a PID control system.)

I believe that the FCV was the root issue, and the worn injectors exacerbated the fault.

 

[The Peej]

Awesome its great when the original poster post a follow up to complete the story.

 

[sfrs4]

@Jinajon thanks for coming back to everyone with the "solution" as much as we can provide help the final solution is always the best thing to see on here, so when later people search the same problem they will find a hopeful solution to the problem as well.

 

[Jinajon]

100%. I've spent my fair share of time trawling forums for info on a specific problem, and so often just when it gets interesting, the thread goes dead.