Spark plugs:

A part related to the ignition coil we have discussed, is the spark plug.
Spark plugs are electrical gadgets that fit into your engine’s cylinder head; where it’s “sparks” to ignite the fuel. The spark plug is connected to the ignition coil that generates the hight voltage needed to spark the fuel and create combustion within your engine. The combustion process is a chemical process or a reaction between fuel and oxygen and it releases heat and light energy in the engine.

You can think of spark plugs as a tiny bolt of lightning, small but mighty! By putting the engine’s pistons in motion, your car can power up and produce a smooth burn of the compressed air-fuel mixture. Spark plugs can withstand extreme heat and pressure within the cylinders and are built to burn off deposits from fuel additives or other contaminants.

Thus, without a spark your vehicle won’t start- or even go anywhere. There is of course also some signs or symptoms that indicates if you have faulty spark plugs.

Symptoms of a faulty spark plugs:
1. Reduction of gas mileage- Dirty or fouled  plugs causes a sudden drop in fuel economy, which means, you are going to visit the petrol station more. Faulty plugs have a negative impact on your gas mileage.

2. Lack of acceleration- If your vehicle has lost its get-up-and-go, bad  plugs could be the culprit. A dirty  plug does not spark effectively which can cause your vehicle to perform poorly.

3. Hard starts- When you are having trouble starting your vehicle, your first thought might be a dead battery or an empty gas tank. You won’t be going anywhere if the faulty plugs can’t produce the spark to start the combustion process.

4. Engine misfiring- Like mentioned before, misfiring can be caused by a lot of faulty parts, including plugs. An engine that hesitates or misfires instead of running smoothly may be attributed to faulty spark plugs. If the combustion process is interrupted it can cause the performance of your engine to suffer.

5. Rough idling- The faulty plugs may cause the vehicle to vibrate when idling or it causes a rough sound when idling.

What to do when you identify these symptoms?
Firstly, driving with spark plugs in a bad condition can result in incomplete combustion and damage to the catalytic converter of the vehicle.
It is very important to never skip a major service on your vehicle, for it includes the replacement of spark plugs.

Go to your nearest Vag Spec Centre when you detect these symptoms and trust your VW and Audi specialists to take care of your vehicle.

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