Question: I took your advice and purchased a diagnostic scanner. I’ve been playing with it and trying to make sense of some of the things on the data list. I remember you saying that the “fuel trims” ...

There's a reason more of us aren't professional tuners. Most of us haven't dedicated our lives to making horsepower, improving drivability, or lowering elapsed times. The majority of us can do a good ...

U.S. regulators settled on a less stringent set of fuel-efficiency standards for light-duty cars and trucks than initially proposed, easing pressure on car makers to ramp up electric-vehicle sales as ...