What is the typical fuel rail pressure on a 2.2 Diesel X Type?
My X Type keeps cutting out when warm with just a flashing glow plug warning light, no codes in ECU.
It would appear to cut out when the car thinks the fuel rail pressure is 200000kPa.
Running the live data capture on the laptop I managed to capture the fuel rail pressure the last three times the car cut out, each time it was at 200000kPa.
I think I might have a faulty fuel rail pressure sensor.
Even when I was keeping the revs low it cut out reading fuel rail pressure at 200000kPa.
See pictures below:

 

Hi DavyJ,

I don't have any direct knowledge of the Jaguar Diesel engine myself, but for what it is worth in reading your posts and the high fuel pressure readings you are seeing, it stands to reason that it maybe a false reading from your Injector Pressure Sensor that the ECM would then try to correct by reducing fuel flow from the high pressure pump via the fuel metering valve. Probably forcing the ECM to over compensate and starving the engine of fuel pressure.
Alternatively the fuel metering valve at the rear of the high pressure fuel pump could be malfunctioning and not regulating properly and over pressuring the injection system, but I would have thought you would get unburnt fuel smoking when that scenario begins to occur unless the ECM has a max fuel pressure failsafe threshold and shuts down the engine quickly,

Either way it is very odd that you do not get error messages for any of these scenarios as the ECM should be seeing the anomaly and reporting it.

There have been posts elsewhere for earlier diesel engines with cut out problems that seem to point to high pressure pumps developing fatal bearing issues, creating metallic debris and damaging the injectors downstream. That scenario doesn't seem to initially fit with your high fuel pressure observations.

A few last random thoughts....
Three years sitting idle...fuel condition (stale, water contaminated or biological growth)?
The repair process photos ..... you effectively putting it through a rotisserie, what might you have stirred up in the tank that has then later been picked up and taken through the system?

 

Thanks for the reply Mark!
Car runs fine when cold, when at temp you can feel the engine misfiring/stuttering slightly. What I think is happening is similar to your thoughts - based on the live data, the ECU thinks the fuel pressure is too high and throttles back resulting in fuel starvation and hence misfire, when the fuel pressure rail reaches a max allowable upper limit the ECU shuts it off. 200000kPa is a repeatable number when my engine cuts out and not coincidence so I’m thinking this is the max fail safe limit.
I have ordered a new Delphi Pressure Rail Sensor, not cheap but don’t trust the ones fraction of the price on online auction sites.
I pick it up tomorrow and will fit over the weekend.
Fingers crossed.

Although the car was sitting for three years I was still periodically starting it and topping up the fuel.
Turning it on its side could have dislodged some debris but thought this is would not get passed fuel filter and fuel flow is ok when engine is cold.

 

The fuel metering valve is also a theoretical candidate, if it has developed any leakage or internal mechanical binding (could be a hot fault), it could defy control signals from ECM and over pressure the delivery.

 

Rail pressure sensor is very unlikely to be at fault.
I would suspect imv and wiring to it.

Paul.

 

Hi Paul,
imv?

 

Fuel needed by the pump/rail/injectors varies depending on load, so to control how much the pump sucks in from the tank, a valve is fitted in the low pressure side of the pump (inlet metering valve or IMV).

Read post #6 =

https://www.jaguarforum.com/threads/...ms-help.74234/

 

New Delphi IMV purchased today and fitted…
No difference, car still cutting out and glow plug light on.
I still think it’s the common rail pressure sensor at fault as when car cuts out the diagnostic running in real time is saying 200000kPa! This is a max value as when I got the nice man from the RAC to tow the car home I pulled out the wire for the pressure sensor, car wouldn’t start but diagnostic on turn over reading 200000kPa.
Now trying to get a pressure sensor online, vary in price and I’m sure in quality.

 

I am thinking off changing my High pressure fuel pump.. .
I posted on this last week,, I cant get the Bolts undone,..

But there is this lad on youtube showing how to diagnose the Electrics on the X type .. (even if its not the issue , its interesting )