What Do Spark Plugs REALLY Do? | Junk Torque Podcast Explains Engine Ignition Basics

Welcome to the Junk Torque Podcast — your no-BS breakdown of all things automotive! In this episode, we’re diving deep into spark plugs: what they are, how they work, and why they’re absolutely critical to your engine’s performance. Whether you're tuning up your daily driver or wrenching on a weekend project car, understanding spark plugs is a must. We’ll cover everything from heat ranges and gap settings to signs of wear and how the wrong plug can ruin your day. Hit play, get greasy, and let’s fire this one up! Hi I'm Noel, the Junk Yard Racer - I'm a retired mechanic, ex speedway racer and automotive enthusiast. I've been working on all sorts of engines since I was a young child, from my first Morris car through to navy ships, farm tractors and gold and turf equipment, and I'm here to share my knowledge.