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With a faulty ignition coil, you are likely to experience some performance issues with your engine. The ignition coil is the component that generates the engine spark in your vehicle.
Faulty ignition coils will produce symptoms that will alert you of a potential issue. Such symptoms include;
Some cars use one ignition coil to create a spark that runs the whole vehicle. In such cars, a faulty ignition coil is likely to affect the vehicle’s starting condition.
The ignition coil is one of the most vital parts of your car ignition system; engine problems are bound to happen when they are faulty. A faulty ignition coil is responsible for your engine misfire, loss of power, loss of acceleration, and rough idles.
A faulty ignition coil will cause an engine misfire, which will, in turn, trigger the car’s computer, lighting the engine check lights.
If you detect such performance issues with your vehicle, you should perform a particular test. One of these tests is checking your car’s ignition coil with a multimeter.
A volt-ohm meter or commonly known as a multimeter is a tester that measures electrical, current, voltage, resistance, and other values.
The first thing to know is the required resistance reading for your ignition coils. Displayed in range (“ohms” (symbol: Ω), these readings specifications are usually in your vehicle’s factory service manual.
The ignition coil (s) is usually found on the engine. The ignition coil can also be bolted to the spark plugs or can be mounted remotely around the top of your engine.
Mostly held in by one or two bolts, you need to remove the bolts using your hand tools. Ignition coils are quite simple to remove; all you need is to unbolt them.
The two ignition coils’ circuits need checking. The ignition coil has both secondary and primary ignition circuit. First, you need to connect your digital multimeter’s negative and positive leads to the negative and positive terminals of your vehicle ignition coil.
Terminals are positively and negatively marked on some coils. You can locate other terminals at the connector.Ignition coil’s primary resistance should be ranging between 0.4 and 2 ohms. It’s advisable to check at the manufacturer’s specifications for correct readings.
After checking the readings, if a zero reading is displayed, it means your ignition coil has a problem within the primary winding.
This step involves connecting the positive terminal of your ignition coil to your digital multimeter, and then to the high output terminal which runs to the spark plug.
The majority of the ignition coils usually have a secondary resistance of about 6,000 to 10,000 ohms. It is better to check with the manufacturer specifications for the required range.
If a zero reading is showing, that means that the coil has a problem and needs replacement. Having excessive reading also means that your coil is open, thus requiring a replacement.
This step involves following both Step 4 and 5 for testing the other individual coil if your car has more than one. Ensuring that all the ignition coils are operating in perfect condition is essential.
Replace any faulty coil after testing all the ignition coils. Next, you need to reinstall the rest of them on to your vehicle. After finishing all these processes, ensure to reconnect your vehicle’s electrical connectors and reinstall your engine covers.
For those who are not good with car repairs, and cannot replace their ignition coil by themselves, you can take your car to an auto repair shop.The cost of ignition coil replacement will depend on the type of vehicle you drive. It will also depend on the auto repair shop you take your car to. Depending on your vehicle, the overall estimated charges should range from $ 150-$600.
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