sorry guys was out for a while and thanks for the questions. definitely leaning towards injectors im saving now.. the yes I have ccv mod ive checked oil level fine water level fine . it seems to be the worst after acceleration to idle and the harder I drive the more smoke. did buzz test .all there .didn't sound as sharp and crisp as I have herd before did contribution test. no 8 low output could no give me numbers .said only dtc s he saw where exhaust back pressure something about 5 in ex. and aih nothing else