Ignition Coil Test Tips and Replacement Cost

ignition coil test

Every car has at least one ignition coil. The purpose of an ignition coil is to boost the voltage generated from the car battery in order to ignite the fuel and start the engine. A car battery generally produces a 12-volt current. The ignition coil transforms that low voltage into over 15,000 volts, which is the amount that a car needs to start up. Without good ignition coils, your car won’t be able to start up or function.

Many newer cars have multiple ignition coils, one for every spark plug. This means if your ignition coils wear out then you have to spend more money replacing them. On top of that, you have more labor costs associated with their replacement as well. You’ll know when your ignition coils are going bad when you experience engine misfires, poor gas efficiency, car stalling, or car won’t start at all. At this point, you should be very suspicious of your ignition coils.

Read also: Symptoms of a bad transmission speed sensor

Ignition Coil Test Tips

Below are some steps to determine which coil are malfunction:

  • Start the engine
  • Pull out ignition 1
  • See the engine condition changes: If the engine become rough or vibrate, it suspect the ignition coil malfunction. but if the engine condition constant or not changes, mean the ignition coil good
  • Repeat this process to ignition coil no 2, 3, 4

But it’s better for you take your car to an auto body shop and have them perform a diagnostic test on them. This should cost you between $50 and $100 just for the test. If it turns out that you need new ignition coils then your costs are going to be considerably higher. Remember that you cannot just replace one ignition coil if your car has multiple ignition coils. Generally, if one coil goes bad then all of the coils need to be replaced together. Otherwise, you would be risking another coil going bad immediately after replacing the last bad coil.

The Average Cost to Replace Ignition Coil

The average cost of a single ignition coil ranges from $75 to $300. The actual cost will depend on the make and model of your vehicle. Another big expense comes from the hourly rate for the labor. Most auto body shops these days charge $100 per hour to perform any kind of maintenance service on your vehicle. Fortunately, replacing ignition coils takes about 30-40 minutes for a mechanic to do. So you’re looking at roughly $60 for the labor costs associated with the job. If you only have one ignition coil to replace then you’ll be paying anywhere from $135 to $360. But if you are having multiple ignition coils replaced then you could be looking at between $270 and $500 just to accommodate the costs of the extra coils and the added time of the labor.

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