525d injectors still loud after replacement

[kajaalyo]

Hy,
I had problem with my injectors -loud, down on power, smoking and shaking engine.
I had changed them with factory refurbished bosh injectors and I also changed the MAF sensor with Pierburg brand new one.
This fixed all the problems, but injectors are still loud, not nearly as loud as old ones was, but still.
You can hear ticking sound when cruising or driving at low revs, before the turbo spools.
Also they are a bit loud at idle.
I did reset adaption values with INPA, drived the car for 90km.
Is this sound normal? I know it is an old diesel, but I`m unsure.
Car was remapped by previous owner, I`m not sure if map is good, will go to stock map, but I`m not sure if car should sound like that or not.

[kajaalyo]

They went quiet after another 100km or so.