Q My question pertains to what an IAC does. Recently my car began stalling occasionally and was difficult to start. My repair guy diagnosed the cause as a “dirty throttle” and cleaned it. This helped ...

Q: My 1988 Mustang has an excellent idle. However, when I stop at a traffic light/stop sign occasionally the engine will shudder, shaking the car a little, and then die. Modern vehicles use an idle ...

The Toyota GT86 (which we recently test drove) family is barely out, and owners have begun reporting problems with the cars’ flat-four 2.0-liter engine. The unit, made by Subaru, apparently ...

This month we will be concentrating on diagnosing a clogged fuel injector using data from a can tool. Diagnosing a clogged injector is not always easy because the symptoms act similar to low ...

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 ...