Symptoms Of a Bad Or Failing Ignition Coil

Jun. 03, 2021

Symptoms Of a Bad Or Failing Ignition Coil

The ignition coil is an electronic engine management component that is part of the vehicle ignition system. The function of the ignition coil is like an induction coil, which can convert the vehicle's 12 volts into several thousand, thereby skipping the spark plug gap and igniting the engine's air-fuel mixture. Some ignition systems will use one coil to provide sparks for all cylinders, however, most newer designs use an individual coil for each cylinder.

Since the ignition coil is the component responsible for generating engine sparks, any problems with it can quickly lead to engine performance problems. Ignition coil failure usually produces some symptoms to alert the driver of potential problems.

1. Engine misfire, severe idling, and loss of power

One of the most common symptoms of ignition coil failure is engine performance problems. Since the ignition coil is one of the most important components in the ignition system, a problem can cause spark damage, which can quickly lead to performance problems. A faulty coil may cause the vehicle to misfire, idle speed, loss of power and acceleration, and a reduction in fuel consumption. In some cases, performance issues may even cause the vehicle to stall.

2. Check the engine light comes on

Another symptom of the potential problem with the vehicle's ignition coil is an illuminated check engine light. The wrong coil can cause engine performance problems, especially misfires, which will trigger the computer and start the check engine light. If the computer detects a problem with the ignition coil signal or circuit, such as the coil is burned out or short-circuited, the check engine light will also be triggered. A lighting check engine light can cause various problems.

3. The car won't start

A wrong ignition coil can also cause a non-start condition. For vehicles that use a single ignition coil as the spark source for all cylinders, coil failure will affect the operation of the entire engine. If the coil fails completely, it will leave the engine with no spark, which will result in a no spark, no starting condition.

Ignition coil problems are usually easy to detect because the symptoms they produce will be quite obvious to drivers. If you suspect that there is a problem with the ignition coil of your vehicle, ask your professional technician to inspect the vehicle to determine if any coils need to be replaced.

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