Your engine feels calm at a stoplight because a hidden idle system keeps fuel, air, and spark in balance. That quiet stability is not luck, it is the result of sensors, valves, and software working ...

I inherited my elderly dad’s 1998 Lexus ES300 a few years ago. It has only about 65,000 miles on it and I’ve never had any major engine problems. But starting about a year ago, it occasionally stalls ...

Why does my 1994 Mazda 929’s engine intermittently rev or surge when I first start it? This could be something to do with the engine’s idle-air control valve which plays an important role in making ...