Now if you are really curious how it works, below is a very brief description of the whole process: Having a single ignition coil per cylinder allows for a maintenance free ignition system as you have fewer moving parts to wear out that eventually need to be replaced such as: In a nutshell, the role of the COP ignition coil is to create and deliver spark to the spark plug. While it's not essential to know how the coil-on-plug COP ignition coils work on your Nissan Sentra, I've included a brief description of how they work (for those of you who would like to know the how and why). This is why a spark tester becomes an indispensable tool. NOTE: You run the risk of damaging a good ignition coil by pulling the coil off the spark plug while the car is running (to listen for the audible clicking sound the spark makes).Īlso, this way of checking the ignition coil for spark will not give an accurate test result.
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