Modern internal combustion engines — including those that run on diesel fuel — require a lot of special parts and systems to prevent dumping excess emissions into the atmosphere. Not only are those ...

I own a 2013 Audi A6 diesel, which for the past six weeks has sporadically gone into limp home mode with the engine management light flashing. Each time, restarting the car has cleared the fault and ...

The National Highway Traffic Safety Administration announced a recall of nearly 48,000 vehicles due to a valve issue.

Replacing the EGR cannot have affected the turbo. But the turbo might have been on the way out anyway. They usually fail because the turbo oil feed and/or oil return pipes get blocked with carbon from ...

Controlling vehicle emissions in modern vehicles involves more than just bolting up a catalytic converter and calling it a day. There are other components that effectively, and intuitively, cut out ...

Volvo developed Precision Flow exhaust-gas recirculation (EGR) to improve fuel economy by 3 percent even as they met EPA's 2007 emissions standards for on-road diesel engines. An electronic ...