Tens of thousands of diesel cars are illegally pumping out dangerous pollutants because unscrupulous garages have removed exhaust filters designed to cut emissions of deadly particulates. Air ...

You may recall when the EPA mandated that, starting in 2007, all new on-highway diesel engines must limit the emission of particulate matter. To comply with this regulation, equipment makers ...

When an emissions aftertreatment issue rears its ugly head, one of the biggest mistakes a technician can make is to assume it’s an emissions aftertreatment problem. Often, issues that present in the ...