Reference was intake tube connecting to throttle body that you have replaced.

Do I understand correctly that this problem started prior to the parts replacements you have done? If not, I suggest checking your work. The rule of thumb is there are no coincidences when working on a vehicle.

I suggest spraying carb cleaner, brake cleaner or spraying propane with the engine idling to see if you can locate a vacuum leak. Have you checked fuel pressure?

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas