Starters and Ignition Systems
Ford Expedition XLT
Ford Ranger XL

How do you know if an ignition coil is bad?

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Answer

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Wiki User
02/27/2007

Remove it and test it. A good service manual for your car should tell you what to look for. If you don't have an ohm meter to test it, remove the coil and take it to a reputable auto parts retailer in your area.