The “check engine” light is the most annoying orange icon in America. Half the time the car feels fine, and the other half ...

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Emissions testing has become a hot topic in the '90s and will continue to generate more interest as testing is enforced nationwide. You can count on it. For those rodders who have never experienced a ...

Driving a well-maintained, regularly serviced automobile is the best method of passing an emissions check, but what are ya, some kind of square? If you don’t have a newer car, check out the tips below ...

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 ...

Beginning July 19, 2021, Californian automotive enthusiasts have yet another item to add to an ever-expanding list of dos and don'ts (mostly don'ts) regarding their mandatory biennial visits to ...

I heard there's some sort of gas additives that you can get that will let your old, maybe "not-quite-up-to-the-environmental-standards" car pass the smog test. Anybody know?<P>2Fast4U<P>[This message ...

From July 19, 2021, California will start testing for non-approved ECU tunes during its biennial Smog Check program. First spotted by Car Bibles (via Road & Track), the rules state that any software ...

Q. I was walking past an idling early 1960s car that was producing a toxic cloud of smog. His license plate was up to date and I was wondering how this car could pass a smog check. Do “antique” cars ...

This article is reprinted by permission from NerdWallet. When my car failed California’s smog test this year, I wandered from one garage to another trying to determine how to bring it into compliance.