The Justice Department says it will no longer pursue criminal charges for removing emissions controls from diesel vehicles.

In a huge win for the diesel "delete" crowd, an internal DOJ memo reportedly called for dropping criminal charges "targeting ...

A dual-fuel conversion system can offer some of the fuel- and emissions-saving benefits of a natural gas engine without going out and buying a brand-new truck. Recent changes in Environmental ...

Increasingly stringent diesel engine exhaust emissions regulations have, over the past 20 years, reduced output of nitrogen oxides (NOx) by 95% and particulate emissions by 90% in heavy trucks. These ...

Jacobs Vehicle Systems has introduced Active Decompression Technology (ADT), which the company says enables heavy-duty commercial vehicles to benefit from an engine stop-start system and eliminating ...

Vehicle owners are increasingly converting their petrol and diesel cars to run on liquefied petroleum gas (LPG) or compressed ...

The air filter setup on most diesels is the same as on gasoline-powered vehicles, with the filter located inside the cold air collector box located under the hood. You have to take one big precaution ...

Failure to properly maintain your cooling system is a leading cause of catastrophic diesel engine problems, accounting for approximately 40% of engine failures. The damage being done is difficult to ...

The clearances inside diesel injection system parts are closer than those found in any other technology. The plungers and needle valves in injectors need to fit tightly to ensure precise metering and ...