Posted on 9/26/2025
Your engine relies on a controlled spark to ignite fuel and keep things moving. That spark comes from a combination of spark plugs and ignition coils. These two parts work together in the background every time you start your car, and they continue working as long as the engine is running. If either one starts to wear out or fails, you may begin to notice a rough idle, poor gas mileage, or sluggish acceleration. That’s because the spark isn’t happening as cleanly or consistently as it should. The longer these issues are ignored, the more they can affect performance and fuel economy. What Spark Plugs Actually Do Spark plugs sit inside each cylinder and are responsible for lighting the air-fuel mixture. This controlled explosion is what drives the pistons up and down. Every time it fires, your spark plug creates a tiny electrical arc across a gap between two m ... read more