Excessive black smoke from diesels means ????
I guess I thought that heavy black smoke from diesels was from over fueling the pump?? but I am not real sure.I am looking at an 06 duramax crewcab with 300,000 miles, and it runs awesome and idles wi...
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That Dmax has a tune in it of some type. If it idles fine but smokes when you stand on it I would bet $$$$$$ it's either programmer or tuner.
