6 Symptoms of an Ignition Coil Failure

If your vehicle is not running smoothly, or if you noticed some unusual behavior, this could be caused by a failed ignition coil . The ignition coil takes power from the generator and relays it to the spark plugs . This ignites the fuel and makes your vehicle run. Let’s look at some symptoms of an ignition coil failure.

1. Backfiring

One of the early symptoms of an ignition coil failure can be a backfiring. This occurs when unused fuel is emitted through the exhaust system. If you do not resolve this issue on time, you can have a problem with your exhaust, which can cost you a lot. Black smoke or the smell of gasoline are the main symptoms of exhaust damage.

2. Starting Problems

Check your high tension leads (HT Leads). They run between the distributor and spark plugs. Ignition coil failures result in 1 or more spark plugs not receiving the appropriate amount of charge. If it’s hard to start your car in the cold, then this is the main sign of ignition coil failure. You can also test on the HT leads to check that there is, in fact, a spark going from each lead to each spark plug.

3. Fuel Economy

If you noticed that your vehicle is getting less mileage for the gallon, that could also be a bad ignition coil. When less power reaches the spark plugs, your engine starts to use more fuel to compensate for the lack of power transfer.

4. Engine Misfiring

If you drive with a failed ignition coil, your car will cough and splutter regularly, and at high speeds, you will notice your car will jerk and shake. You will also feel a vibration when you are running idle.

5. Vehicle Stalling

If your ignition coil failed, your vehicle would have irregular sparks emitting to the plugs to keep it running. It will lead to the vehicle’s stalling. Or when you want to stop your car, it may just shut off entirely.

6. Coil Failure

If the spark plugs fail, then the coils are forced to work at high output. If you maintain your sparks plugs regularly, you can avoid ignition coil failure.

If the gap in your spark plug widens due to normal erosion, it leads to an increased voltage being required to create a spark in the chamber. The increased voltage demands more current flow through the primary circuit and this increased current flow can overload the primary transistor. If you maintain all these components regularly, your coils will last longer and you will save money.


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