* Engine misfires: This is the most common symptom of bad spark plugs. It can cause the engine to run rough, hesitate, or stall.
* Reduced fuel efficiency: Bad spark plugs can cause the engine to run less efficiently, which can lead to reduced fuel economy.
* Increased emissions: Bad spark plugs can cause the engine to produce more emissions, which can be harmful to the environment.
* Difficulty starting the engine: Bad spark plugs can make it difficult for the engine to start, especially in cold weather.
* Check engine light: If the check engine light is on, it could be due to bad spark plugs.
Spark plug wires:
* Engine misfires: Bad spark plug wires can also cause the engine to misfire. This can cause the engine to run rough, hesitate, or stall.
* Reduced fuel efficiency: Bad spark plug wires can cause the engine to run less efficiently, which can lead to reduced fuel economy.
* Increased emissions: Bad spark plug wires can cause the engine to produce more emissions, which can be harmful to the environment.
* Arcing: If the spark plug wires are damaged, they can arc, which can cause the engine to misfire.
* Check engine light: If the check engine light is on, it could be due to bad spark plug wires.
If you are experiencing any of these symptoms, it is important to have your spark plugs and spark plug wires inspected. A qualified mechanic can diagnose the problem and replace the necessary parts.
