I have a 2013 Camaro with the V-6 engine. When I changed the spark plugs, the old plugs from cylinders two to six were light tan in color, but plug No. 1 was dark and sooty. The engine seems to be ...

An internal combustion engine needs three things to get going: Air, fuel, and spark. The throttle body and intake plenum feed air, while injectors spray the right fuel mix into the combustion chamber.

There are a lot of different types of spark plugs out there, but they all do one job, which is igniting the air-fuel mixture inside the cylinders. A shiny new spark plug does that consistently at the ...