In this video I show how to test an ignition coil pack while the vehicle is running (via power balance test) as well as testing the coil pack while the vehicle is off. The power balance test is an easy way to verify if each cylinder is firing. If you do not hear a reduction in rpm when disconnecting the coil pack harness connector, that particular cylinder is not firing. Check the ignition coil and the fuel injector (link below).Testing the ignition coil while the vehicle is off is an additional test to verify if the coil pack is indeed working or needs replacement. This was performed on a 1997 Nissan Maxima. Please check with your vehicle's repair manual for testing parameters.

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Note:
Any attempt to repair automotive parts and/or systems carries risk of personal injury. Always adhere and follow safe practices when working on vehicles. Such as, safety glasses, jack stands, no loose clothing, etc. No guarantee or warranty is implied. Use the information in this video at your own risk. Carsntoys is a member of the Amazon Influencer Program.

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