This easy task will be impossible unless you have an appropriate set of automotive tools. Spark plugs are critical to the smooth running of your car. They act as a high voltage bridge for electricity within your engine. When electricity crosses this bridge it triggers a spark that ignites the compressed fuels that makes your car engine start. Without the spark plug then, your car will be going nowhere.

You need to change your spark plugs many times in the lifetime of the car as they only last for around two years. The good news is that changing spark plugs is normally quick and easy.

If you do decide to change your spark plug yourself, how do you know when to do it? A good indicator that a plug needs changing is when the engine performance slows down. If the spark plug has been worn out this will be one of the giveaway signs. To confirm this, you can test it using a spark plug gauge.

If you do need to change the spark plug first take a look at the manufacturer’s advice. This will tell you the correct specifications of the plug, so that you can get a suitable replacement. You will also be able to get information from the manufacturer on what alternatives are available to you if the spark plug is no longer available.

When dealing with your spark plug, you should always protect yourself against the risk of electric shock, do this by putting on rubber gloves before you touch anything. Also avoid leaning against the car and handling stuff while the engine is running.

You will need to remove each plug from the engine while it is running. Use a torque wrench moving in an anti clockwise direction to remove the sparkplug. If the engine slows when the spark plug comes out you know that this plug is still working. If the engine operates as normal then this plug is no longer working and needs to be replaced. By removing each plug one at a time and checking the engine as you go, you can pinpoint and identify any plugs that need changing.

Next you will want to test the spark plug wires. You will not be able to do this with the engine running, switch it off and wait for it to cool. You will then test to see if the plug ignition is working. Expose the wire in the plug to any metal surface. If the plug gives off a spark then it is in good condition. You will need to do this for every wire.

This simple procedure, which rarely requires a mechanic, will show you if you need to replace your spark plugs.