|
First thing you want to do is check for any problem codes with an OBD-II code reader - they don't always produce a check-engine light. Could be a bad coil pack or injector issues - I'd have those checked. Carbon buildup would likely not produce the misfire or black smoke you mentioned.
__________________
2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey |