The uneven idle appears to be back but i'm running out of things which it could be.
I've added a video of the rev counter, you cant really hear the engine unfortunately, but it sounds like it going to start revving but drops back to normal. It appears to be doing it every few seconds, and each time it will either do one little rev or two one after another.
It only does it when warm as well.
Brera idle - YouTube
The MAF, MAP, vacuum solenoid, vacuum hoses (front two), Inlet manifold, clutch, flywheel, cam belt and tensioners have been replaced recently.
The EGR has been disabled and blanked and the DPF removed.
I have had some air leaks in the inlet pipework, due to missing clips but I think I've sorted them now.
any ideas what it could be as I'm stumped now.