However, most of the time this issue is due to the ignition system. Faulty ignition coils can affect the timing of when the spark plugs ignite, which causes misfiring and bad timing. Backfiring of the engine is a symptom of a bad coil pack.
What are the symptoms of a failing ignition coil?
If your car is experiencing any of the problems listed below, you may have a faulty ignition coil on your hands:
- Engine misfires.
- Rough idle.
- A decrease in car power, especially in acceleration.
- Poor fuel economy.
- Difficulty starting the engine.
- Check engine light is on.
- Exhaust backfiring.
- Increased hydrocarbon emissions.
Will a bad coil cause backfire?
Any problem that upsets an ignition system spark can cause backfires and other engine performance problems. ... The same result can come from a faulty ignition coil, distributor or rotor and cause a more repetitive backfire.
