





100k piston wear
I am experiencing a cold start studder, has trouble maintaining rpm on the start up sequence almost stalls.. No codes/ghost codes. Im thinking carbon build up or leaking injectors. Never replaced spark plug and coils so starting there. I bore scoping the pistons but have realized I have no context for what im seeing and AI just seems to corroborate w/e I am saying. This is cylinder 2. Ill reply with more when I can work the spark plugs out. They are gritty and im babying them.
F15 2017 x5 xdrive35i n55 engine 100k miles