If a 90s diesel is spewing foul-smelling black soot then it's 1. poorly maintained 2. illegally modified (those guys are pricks). Also DEF, urea, is a NOx control mechanism and does nothing for the particulate matter.…
That could have been for crash reconstruction black box. Which will be (is??) federally mandated now. For a while VW (and the Germans) were the only holdouts.
If a 90s diesel is spewing foul-smelling black soot then it's 1. poorly maintained 2. illegally modified (those guys are pricks). Also DEF, urea, is a NOx control mechanism and does nothing for the particulate matter.…
That could have been for crash reconstruction black box. Which will be (is??) federally mandated now. For a while VW (and the Germans) were the only holdouts.