What Are the Signs of a Failing Ignition Coil?

By Staff WriterLast Updated Mar 25, 2020 6:52:58 PM ET
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The signs of a failing ignition coil include backfiring, starting issues, lowering gas efficiency, engine misfiring, vehicle stalling and worn out spark plugs. The most common symptom of a faulty ignition coil is when the car runs for a while and the engine dies abruptly. This happens when the ignition coil or module becomes too hot.