Changing an engine's plugs should be a relatively simple maneuver. But not if you've built the engine bay so the motor barely ...

Trying to deal with spark plugs under a warranty isn't the easiest task in the world. You can get them replaced, but there ...

Read a good spark plug lately? We hope so, for your engine's sake. But spark plug reading—the traditional way to check your fuel mixture and monitor other vital conditions in the combustion chamber ...

If you consider your spark plugs little more than disposable engine parts to be replaced for every event or two, you're missing out on a valuable engine-tuning tool. Not only can the correct plug ...

Most four-cylinder engines use a single spark plug per cylinder, but a lot of them throughout the years used eight spark ...

In the past decade or so, automakers have turned to downsized turbocharged engines—often with direct injection and higher compression ratios—to boost efficiency. These fancier power plants tend to ...

Rotary engines differ from conventional ones in many respects — and one of them is the fact that they use two different spark ...

Smart plugs are the simpler option: You plug them directly into an existing outlet, and they add a Wi-Fi or Bluetooth ...