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Signs of a Failing Ignition Coil & Choosing the Right Replacement
Symptoms of a bad coil include: Engine misfires (feels like jerking or stumbling), loss of power, rough idle, the check engine light flashing (indicating a active misfire), poor fuel economy, and difficulty starting. When selecting a replacement, first identify the correct coil for your engine using your VIN. Research brands—reputable aftermarket manufacturers often supply the same parts to car companies. Look for a good warranty. Consider if you want a direct OEM replacement or a performance-oriented coil if you've modified your engine.
FAQ:
Q: Can I replace an ignition coil myself?
A: Often, yes. On many modern cars with coil-on-plug systems, it's a straightforward job requiring basic tools: disconnect the electrical connector, remove a bolt or two, and pull the coil out. Always disconnect the battery before starting.
Q: What causes an ignition coil to fail?