* Engine misfires: This is the most common symptom of a bad coil pack. When a coil pack fails, it can cause the spark plug not to fire, which in turn causes the engine to misfire.
* Reduced engine power: A bad coil pack can also cause the engine to lose power. This is because the engine is not able to produce as much power when one or more cylinders is misfiring.
* Increased fuel consumption: A bad coil pack can also cause the engine to use more fuel. This is because the engine is not able to burn the fuel efficiently when one or more cylinders is misfiring.
* Check engine light: A bad coil pack can also cause the check engine light to come on. This is because the engine's computer detects the misfire and sets a trouble code.
