A spark plug is a key component to the overall drivability of any vehicle because they provide the final resting place of all the air and fuel. Without proper spark, the rest of the engine's fuel delivery and electrical systems are rendered useless.
Some signs that you need to have your spark plugs replaced include:
- Poor fuel consumption
- Poor throttle response
- Idle fluctuation
- Poor starting condition
- Loss of power
Spark plugs should be changed at regular service intervals to ensure maximum performance from your car or truck.