Vainparasite

On 6/25/2022 at 6:52 AM, Greydog said:

Morning Martin

Welcome to the Forum

Could be the fuel pressure sensor, take the engine acoustic cover off on the passenger side of the engine is the inlet manifold plenum. At the back of the plenum you will see a sensor and plug, unplug it if the engine now runs freely through the revs the sensor is probably your issue. If not then a scan is needed to determine just what it is.

Dave

Hi Dave it was the fuel filter believe it or not. It looked like the original one from the factory some 17 years ago 😳

Thanks Martin 

I have just bought a lovely 2005 X5 e53 3.0d and it's lovely to drive until I get on the motorway and it won't rev past 3800rpm even sat in N it does the same. Surely it can't be a massive issue as it drives so well under that. Has anyone else had an issue like this?

Thanks

Sorry for my first post to be a question

Martin