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How to Test a Car Spark Plug

Spark plugs are important components in system of a car. Spark plugs enable the proper functioning of a car engine and perform the function of compressing fuels by the use of an electric spark. Although spark plugs wear out gradually, the user should ensure that the spark plug is of high quality in order to ensure longevity in performance.  A car user is advised to take his vehicle for regular engine servicing. Regular engine servicing enables the mechanic to detect on any impending irregularities in the car.  The car user is also advised to replace their car spark plugs after every two years.  

So here is what you do. 

Spark plugs are important components in system of a car.  

A clear indicator that the car has a faulty spark plug is when the engine slows down on its performance. This is an obvious sign that the spark plug is worn out. Before the user replaces the worn out car spark plug, they should first check the manufacturer's description of the car spark plug. The manufacturer's description gives the exact specifications on the original car spark plug and alternative ones in case the user does not find the original type. In order to ensure that the spark plug is completely worn out, the user should test it first. Testing is normally done by the use of a spark plug gauge. Other areas to check on include spark plug cables which indicate any splits, cracks, rust in the engine as well as any other damaged area of the engine.  

The car owner or the mechanic should take precautions against the risk of shock by wearing rubber gloves before they start on the task. The mechanic is also advised not to lean against the vehicle while the engine is still running. The owner/ mechanic can then start by testing the car spark plug functionality by dismantling each plug from the car engine.  Dismantling of the car spark plug is done by the use of a ratchet wrench. With the use of the ratchet wrench, the user is advised to turn the spark plugs in an anti- clockwise direction. This is done while the engine is still running.  When the engine starts to slow down, then the owner of the vehicle should know that the spark plug is still in good condition. If the engine does not react in any way after the spark plugs have been disconnected, then the spark plugs need immediate replacing. 

The next step is removing the spark plug wires. This is done after the engine has cooled down. The owner of the vehicle can then test to see if the spark plug ignition is working. He can do this by exposing the spark plug wire to a metal surface. The spark plug will then emit a spark. This is an indication that the spark plug is in good condition. This action should be repeated for every other spark plug wire. Spark plugs should be also be cleaned regularly so as not to hinder on their performance. The owner/ mechanic of the vehicle should check to ensure that the spark plugs work well and then do another test on the same.

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