For those living in California or other states that have used the Golden State's smog laws as the basis for their own, modifying the engine of most 1976 and later gasoline-powered vehicles is nearly ...

WASHINGTON – The Environmental Protection Agency granted California long-awaited permission Monday to slash emissions from lawn mowers and other small-engine machines, a change it will seek nationally ...

Smog laws don't have to prevent you from making horsepower, as long as you use the correct parts, build the engine the right way, and tune it until it delivers a clean exhaust. It is true however, ...

Megacities like Delhi—2014's dirtiest city in the world—have long struggled with air pollution. A new experimental solution involving a jet engine hopes to give the Indian city of 25 million some ...

Sometimes you just feel sorry for an old car. At that point you have two choices: you can put it out of its misery or you can rescue it. The subject of this tech article is a 1974 Chevy Nova four-door ...

OBD-II diagnostic device BlueDriver interprets engine error codes to suggest what might need fixing, and lets you know if your car is ready for a smog check. Wayne ...

This 1976 Ford F-250 was found in the side yard at Chuck's Glass in Huntington Beach, California. That was in 2011, but I'd known of the F-250 since the 1980s back when Chuck and my dad belonged to ...

WASHINGTON — The Senate approved a measure Wednesday that would block efforts by California and other states to reduce the pollution spewed by small gasoline engines in machines such as lawn mowers, ...

TO LAND at Indira Gandhi Airport is to descend from clear skies to brown ones. Delhi’s air is toxic. According to the World Health Organisation, India’s capital has the most polluted atmosphere of all ...

The Biden administration on Monday proposed curbing pollution pouring out of the tailpipes of new tractor-trailers, buses and other heavy-duty vehicles that forms smog, along with emissions warming ...

Megacities like Delhi-2014's dirtiest city in the world-have long struggled with air pollution. A new experimental solution involving a jet engine hopes to give the Indian city of 25 million some ...