Car Engine Ignition Coil

What is an ignition coil?

An ignition coil is a component of an internal combustion engine that is responsible for generating the high voltage spark that ignites the air-fuel mixture in the cylinders. It is typically mounted on the engine block or cylinder head and consists of two coils of wire: a primary coil and a secondary coil.

Primary coil

The primary coil is connected to the battery and is responsible for creating a magnetic field. When the ignition switch is turned on, current flows through the primary coil, creating a magnetic field. This magnetic field induces a voltage in the secondary coil.

Secondary coil

The secondary coil is connected to the spark plugs and is responsible for generating the high voltage spark. The voltage induced in the secondary coil is much higher than the voltage in the primary coil, typically in the range of 20,000 to 50,000 volts. This high voltage is necessary to jump the gap between the spark plugs and create a spark.

How does an ignition coil work?

When the ignition switch is turned on, current flows through the primary coil, creating a magnetic field. This magnetic field induces a voltage in the secondary coil. The voltage induced in the secondary coil is much higher than the voltage in the primary coil, typically in the range of 20,000 to 50,000 volts. This high voltage is necessary to jump the gap between the spark plugs and create a spark.

The spark created by the ignition coil ignites the air-fuel mixture in the cylinders, which in turn causes the engine to run.

Symptoms of a bad ignition coil

A bad ignition coil can cause a variety of symptoms, including:

• Engine misfires
• Engine hesitation
• Loss of power
• Hard starting
• Stalling

Causes of a bad ignition coil

A bad ignition coil can be caused by a variety of factors, including:

• Overheating
• Electrical shorts
• Mechanical damage
• Age and wear

How to replace an ignition coil

Replacing an ignition coil is a relatively simple task that can be completed in about an hour. The following steps provide a general overview of the process:

1. Disconnect the negative battery terminal.
2. Locate the ignition coil and disconnect the electrical connectors.
3. Remove the bolts that hold the ignition coil in place.
4. Pull the ignition coil straight up to remove it.
5. Insert the new ignition coil into the engine and tighten the bolts that hold it in place.
6. Reconnect the electrical connectors and the negative battery terminal.

Conclusion

The ignition coil is a critical component of an internal combustion engine. It is responsible for generating the high voltage spark that ignites the air-fuel mixture in the cylinders. A bad ignition coil can cause a variety of symptoms, including engine misfires, hesitation, loss of power, and hard starting. If you suspect that your ignition coil is bad, it is important to have it replaced as soon as possible to avoid further damage to your engine.