E91 325d - Part throttle rattle / clatter - Injectors?

[seismic22]

Hi,

We own an E92 330D and a E91 325d. Both sound similar at tickover (325d might be quieter) but at part throttle under load the 325d has a noticeable and increasingly annoying rattle / clatter similar to a stereotypical diesel sound made by diesel years back. The 330d with the same engine does not make the noise at all.

MPG seems okish (42mpg at 85mph ish) and power seems ok if not a little lacking beneath 2,000 rpm. It did have a stutter just before 2,000rpm until a couple of days ago when I disconnected the EGR and hey presto no stutter. So generally the car seems to perform ok.

I have run INPA and checked the mass adjustment figures on the injectors and all seem well within tolerance, not perfect but near enough.

I have done some research but cant work out what it is. I found this video online of a chap who had the same noise : https://www.youtube.com/watch?v=3eDxChwaKmg

Car has full history (independent specialist) and last owner for 3 years prior to myself definitely seemed to care for the car. Very recent full service. Oil level fine. Have run a bottle of Forte through it recently and has made little difference. If anything, the disconnecting of the EGR seems to have quietened it very slightly (throttle response seems better too) but that could be a placebo!

Any ideas on what it is / whats the next step? Thanks

[seismic22]

In fact I have just driven the car and the noise is there from tickler and throughout the rev range just Very audible when under load at part throttle.

Thanks