Posted on 2/28/2025
A rough idle can be one of the most frustrating issues for drivers. Instead of a steady, consistent hum when your car is at a stop, you may notice shaking, vibrations, or even a stalling engine. While some minor fluctuations in idle speed are normal, excessive roughness is a sign that something isn't working correctly under the hood. Identifying the root cause early can help prevent more serious problems, ensuring that your vehicle runs efficiently and reliably. Common Causes of a Rough Idle There are several reasons why your car might be idling roughly, ranging from simple fixes to more complex engine issues. One of the most common culprits is a dirty or failing spark plug. Spark plugs are responsible for igniting the air-fuel mixture in your engine’s cylinders, and when they wear out, misfires can occur. A misfire causes uneven power delivery, which you’ll feel as shaking or hesitation when your car is idling. Another frequent cause is a clogged or ... read more