Spark plugs might sound small and inconsequential, but neglecting to change them can have serious and expensive repercussions ...

Spark plugs are a key component of your gasoline engine, and they have a key role in the ignition process. How long can you expect them to last?

In the past decade or so, automakers have turned to downsized turbocharged engines—often with direct injection and higher ...

While a lot of automotive engines have one spark plug per cylinder, the HEMI V8 might have two per cylinder. What is the science behind that?

Gasoline internal combustion engines need three fundamental things: fuel, oxygen, and spark. The sexy aspects of modifying cars are focused on the first two elements: Double Pumper carburetors, ...

Can you really use a pencil to replace the inside of a spark plug? One intrepid group of experimenters decided to find out ...

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 ...

Q: I got a pretty good shock from one of my Toyota Camry’s spark-plug wires. I didn’t think much about it at the time other than to never touch them again when the engine is running. Later I mentioned ...

All spark plugs may look the same to the untrained eye. Unfortunately, nothing could be further from the truth. For starters, spark plugs come in many types that are mainly differentiated by the ...