Spark Plugs

Look closely at a stock, unmolested GM LS engine, and you’ll probably see the spark plug boots protected by small metal canisters. GM fit these things on the spark plug […]

Spark plugs are a critical element of any internal combustion engine. They are the proverbial wizard’s wand that ignites the air/fuel mixture to create the glorious and mysterious magic we […]

What does indexing the spark plugs mean? I was poking around one of my favorite forums and indexing plugs was mentioned and I’m not sure what they were talking about. […]

For many engines, spark plug replacement is a relatively simple job—yet it’s also a job that absolutely needs to be done properly to avoid near-catastrophic issues. Horror stories abound of […]

I have a 355ci small block Chevy that was rebuilt about a year ago and we included a set of Edelbrock aluminum heads, a Comp flat tappet cam, and an […]

While we’ve covered resistance in spark plug wires before, the opportunity recently arose to talk about resistance in spark plugs and plug boots too. You may have read the earlier […]

Q: How does an ignition coil work? … A: Ignition coils are electrical transformers. They convert low voltage to high voltage through a process called induction. There are various designs, […]

In some vehicles, pulling and replacing spark plugs is a nightmare: Impossible to reach plugs. Headers, shock towers, and air conditioning parts in the way.  Factor in the multiple opportunities […]

I’m confused. I see all kinds of opinions about iridium and platinum spark plugs versus the normal copper plugs. Some say they’re good while others say not to use them […]

Do you have enough voltage reaching your spark plugs? The voltage required to light your plugs is constantly changing and can range from 5,000 volts to 40,000 volts and higher, […]