What is an ignition coil replacement?
An ignition coil replacement services the mini transformers inside your car that convert the low voltage of the car battery into a powerful enough spark to ignite the fuel in the engine’s combustion chamber. Ignition coils sit on top of the spark plugs in the standard coil-on-plug system that’s common in modern cars. They’re sold pre-assembled and in individual and multiple packs.
What are the symptoms of a bad ignition coil?
In the absence of clear damage, it can be hard to determine whether your ignition coils are failing or not. Here are some warning signs to watch for:
It’s been a while since you last replaced the ignition coils: Ignition coils should be replaced (or at least inspected) every 80,000 to 100,000 miles.
Engine misfires, rough idling, unexplained vibrations, and sudden loss of power: If your ignition coils aren’t working, your engine cylinders won’t fire correctly or at all. This can produce unbalanced shaking, knocking, and stalling.
Poor gas mileage: Reduced fuel efficiency goes hand in hand with a misfiring engine.
Increased emissions: Ignition coil failure causes the unburned fuel in your engine cylinders to pass out the butt of your car and make the air stinky.
A check engine light: The check engine light indicates a multitude of errors, but an OBD code reader (or a mechanic) can tell you if it relates to the ignition coils.
Trouble starting the car: Without the vital spark provided by the ignition coils, your car might not start at all.
Key Takeaway If your car engine runs poorly and misfires, you could have an ignition coil problem.
How long do ignition coils typically last?
Ignition coils typically last 80,000 to 100,000 miles. Often, malfunctions and wear in other parts of the car cause ignition coils to fail. For example, if your ballast resistor breaks, your ignition coils might fry under the resulting power surge. Loose ignition cables and gaps can cause your coils to compensate for ever-larger doses of electricity. And finally, a lack of general maintenance could cause air, moisture, and dust to enter and corrode the coils.
Is an ignition coil easy to fix?
Ignition coils are usually easy to access and simple to replace, making them a great DIY job. However, as with services concerning your car’s electronics, you need to be careful about handling wires and preventing shocks. Try and find a detailed repair manual or instructional video before you begin, and remember your protective equipment.