What are the Symptoms of Bad or Failing Spark Plugs?

Spark plugs are one of the essential parts of a car's engine. They're what ignites gasoline when you crank the car's engine, and they're also responsible for running the car. But if it's not working right, it can cause problems. That's why you'll notice bad or failing spark plug indicators. Different indicators of a bad or failing spark plug are listed below.

The Car Can't Start

If your vehicle is tough to ignite or has difficulty getting it going, you may have a failing or faulty spark plug. The spark plug acts a big part in getting the car's engine moving. Your vehicle needs the gasoline to ignite to start the vehicle. A bad spark plug will only make this process harder.

Deteriorating Gas Economy

If your car's fuel economy is deteriorating, it can be due to a faulty spark plug. A faulty spark plug will make starting the car difficult and cause the vehicle to use more gas.

The Car Has Trouble Accelerating

The engine can fail when you try to accelerate your vehicle due to a broken spark plug. This can be dangerous since it makes it tougher for the car to move appropriately and merge or exit on the highway. A failing spark plug can cause this by not igniting gasoline correctly.

The Engine Overheats

If your car's engine overheats, this is another sign of a fault spark plug. Overheating can happen when parts of the machine become too hot. This can harm them, making it difficult for you to operate the car. Overheating can also cause your vehicle to malfunction- not being able to jolt at all or go very far.

The Car Takes Longer to Warm Up

If the engine doesn't start when you turn on the car, it may have a faulty spark plug. This is because not all spark plugs are created equal. The colder outside may cause them to become tougher to start, which could mean that your sparkplug isn't operating appropriately.


If you have a failing spark plug, it is essential first to identify the source of the problem. If there's any suspicion, we recommend calling Autoworks of Issaquah today for service and repairs.

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