[Douggefreshvt]

After owning an N54 BMW for several years I became familiar with the engine's quirks, requirements and failings. It was also an awesome engine and I loved every second of it. Now I have the 750 which is an N63 and it is nothing but joy so far. The CCP work was performed on the engine before I took CPO delivery. I purchased at 54k miles and the work was done at just over 50k miles.

Just recently I've noticed some similarities in my current engine with the behavior of my previous one. Most noticeable is the occasional rough idle that I used to get where it feels almost like a bit of un-aerosolized gasoline drips from the fuel injector and causes a momentary blip/hesitation in the engine. It's barely noticeable but I notice it. It got me wondering if the 7 series is supposed to be walnut blasted/carbon cleaned by some other method in the same manner the N54 5 series was and/or if fouling of plugs and fuel injectors was commonplace in this engine also.

Any thoughts/experience? Also, I wondered if this would be covered under CPO warranty in your opinions? I would expect normal fuel injector wear and tear would not be but if it was faulty that's a different story. New plugs and harnesses were done in October 2019 by an indy but all OEM parts, nothing exotic.

I am putting Dinantronics on the car at Turner Motorsports in a few weeks and am trying to cover the bases before then.

Thanks in advance!