OE coils are known for their high failure rates. Engine misfires, rough idle, a decrease in power under acceleration, poor fuel economy, and a check engine light are all signs of an ignition coil that has failed. Read along for more technical information on how to diagnose a failed coil, and why the original equipment
Contrary to popular belief, the ignition system isn’t always the cause of an engine misfire.
Accurate diagnosis of any suspected ECM-related fault is important. This video is sponsored by The Group Training Academy.