Gas-powered internal combustion engines need spark plugs to (literally) ignite and complete the combustion stroke, enabling the motor to produce power. They may seem unusual to the untrained eye, but ...

How does spark plug timing work? An explanation of automotive ignition systems. Ignition coils, distributors, and firing intervals all play an important role in ignition. Note: The cylinder order from ...

If you've ever seen a mechanic draw a tiny line on a spark plug before changing it, they're not performing witchcraft — they're indexing it. The idea is simple. Most standard types of spark plugs have ...