If your car has started to feel like it’s doing a tiny “buzz” at idle or a faint shudder when you pull away from a stop, ...

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 ...

Once upon a time, it was considered good practice to warm up your engine by letting it idle for a little while before setting off. These days, however, people tend to just jump in the car and go. Is ...

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 ...