Mine was doing this.
It was the Bosch fuel pressure regulator on the side of the high pressure fuel pump, it started playing up when the engine gets up to temperature. Engine would never cut out when cold, only once a bit of temperature got into the engine, then it would randomly stall during low speed gear changes, or on the initial rev of the engine when trying to pull away. Or if it didnt stall entirely, the engine would stumble and go into limp mode with ENGINE SYSTEM SERVICE URGENT displayed.
Replaced the regulator 7 months ago which fixed the issue. Not had any problems whatsoever since then.
Be very observant if you order a replacement via ebay, because Euro 3 and Euro 4 D5 engines have a slightly different design of Fuel Pressure Regulator.
The Euro 3 item has THREE screws, and a connector plug that that points sideways, towards the airbox.
The Euro 4 item has TWO screws and a connector plug that points down towards the gearbox.
If that part does not resolve the issue, then it would be wise to get a diesel specialist to take a look and do some proper diagnosis to avoid wasting any further money.
|