Black smoke indicates the fuel mixture is too rich. Has the check engine light come on? Have you checked any sensors such as the O2 sensors, temp sensor...?

Answered by Jacobandnickolas (expert)
57,318 answers provided

Black smoke (rich) should set an error code in PCM, get codes read, could be a bad sensor like O2, coolant temp, Mass air flow etc.

Answered by mmprince4000 (expert)
8,852 answers provided