One of my Jaguars, an estate has a fuel feed issue which i am trying to get my head around. This is what happened....

I left the car idling one cold day with the heater on to warm up the car. 15 mins later i returned to the car to find it had stopped. Trying to restart the car, it ran for a few seconds then stopped, eventually it wouldn't start at all. As this was at night and i didnt want to get my hands dirty, i called breakdown recovery who diagnosed very low fuel pressure (none in fact) Further investigation the filter was empty. He used a hand pump to prime the filter and the car started and ran for some 10 mins before stopping again. Again the filter was empty. Each time the filter is primed, it runs fine until the filter empties, then she stops.

The car was relayed home and parked up, and to be honest, iv'e not had much time to investigate. However, reading the Jaguar manual, it clearly shows there is a lift pump in the tank for the 2.0L diesel, when discussing this in the Jaguar X Type groups, two people, one an experienced ECU remapping guy are adamant there is NO lift pump in the tank on a 2.0L diesel, but yet the Jaguar manual says there is, these guys maintain there is sufficient suction from the high pressure pump not to warrant a lift pump in the tank. Who is right?

There is absolutely no restriction to the fuel flow from the tank, i have replaced the fuel filter, and i can prime it by sucking the air from it with a pipe. I did buy a 12v inline cheap fuel pump which i intended to work around the issue but havent had time to fit it.

 

The diesel x type has no lift pump in the tank,the main injection pump has a built in lift pump, I can assure you 100%.
The symptom you are having is a small air leak in the fuel line somewhere between the tank and filter.
Pay careful attention to the push and lock fuel line connections on the fuel filter and any on the top of the fuel tank !.

Paul.

 

Thanks for the reply. To check for an air leak isn't going to be easy without dropping the tank which is a major job. I cant understand why a leak would suddenly develop when the car was left idling, although anything is possible. Perhaps if i pumped fuel BACK down the fuel pipe under pressure and looked for a diesel leak along the way, that might reveal something?

But why would the Jaguar service manual specifically show a fuel pump in the tank and mark the page 2.0D??

 

On idle the fuel flow is small on the supply line, if the air leak is slight I would expect the filter to receive a small amount of fuel as well as the air.
It may take some minutes for the fuel pump to use up the filters fuel before air enters the pump, whilst at higher fuel demand, the small air leak becomes less significant, and the return pipe would remove the air (back to the tank).

My thinking is if no fuel leak is found, this would imply an air leak at the highest point in the fuel line, namely the fuel filter area on the bulkhead, otherwise it would be in the fuel tank itself, (above the fuel level).

If you have not done so, replace the fuel filter first.

Paul.

 

Yes, the fuel filter was the first thing that was changed. The car will happily run on the contents of the filter, but once that is empty, it stops. If i sit and rev the car above idling speed, it only runs for about 3 or 4 mins and then stops

 

Part # 4X43BC





2.2 mistake maybe?

 

Hhhmmmm......

 

This is what confused me Dell....

 

Sorry in advance for reviving an old thread, just interested to know if you found a solution to your fuel flow issue as I have exactly the same symptoms on my 2004 x-type 2.0d? Having spent a considerable amount of time researching the symptoms and fault code logged I've replaced various fuel system components and still got no further with diagnosing or resolving the problem. Thank you.