Ignition coil problems will prevent your car from starting and running smoothly. Knowing the symptoms and causes of a bad ignition coil is necessary in order to detect the issue and address it immediately. In the case of a damaged or worn-out ignition coil, replacement is the best option. Auto Parts Warehouse offers quality replacement ignition coils right here: https://bit.ly/2P2OlhY
In this guide, we’ll list down the common symptoms and causes of a bad ignition coil.
Ignition Coil Failure Symptoms:
- Engine misfiring (coil misfire) or backfiring
- Difficulty in starting the vehicle
- Poor fuel economy
- Vehicle stalling
Causes of Ignition Coil Failure
Spark Plug Gapping
Improper spark plug gapping will overwork your ignition, resulting in more voltage use to bridge the gap and create a spark. Higher voltages put more stress on the ignition coil and other parts, such as the ECU driver. In turn, a faulty ECU driver can stop the ignition coil from producing a spark. Refer to your vehicle’s manual for spark plug gap specifications.
Leaking Valve Covers and Moisture Intrusion
Some COP style engines’ spark plug and ignition coil are placed in a tube that is part of the valve cover. Overtime, the seal between the valve cover and spark plug tube can fail and cause oil to leak, filling up around the spark plug and ignition coil, which could damage both parts.
Moreover, some vehicles’ air conditioning units moisten and drip onto ignition coils, filling up the spark plug holes with water. Other manufacturers include a marine-grade di-electric grease with the ignition coil, securing the coil-on-plug boot and spark plug terminal nut, and preventing moisture from getting into the voltage transfer and spark generation process.
Valve cover gaskets are the most likely to leak while water intrusion, although more unlikely, is an often an overlooked cause of ignition coil issues. Other possible reasons for coil misfire are mechanical damage to the coil itself (broken connectors) and problems with your vehicle’s wiring harness electrical connection. As you see, the usual causes of ignition coil problems aren’t the coils themselves but other underlying issues. Regular checking for oil leaks, moisture intrusion, and spark plug issues can prevent ignition coil damage. Understanding how the whole ignition system works also helps proper diagnosis.