How to Test Ignition Coils for Signs of Trouble?

Update:Sep 07,2021
Summary:   The ignition coil is an important part of your car. This piece of electronic equipment is installed in the ignition system and consists of an ignit......
  The ignition coil is an important part of your car. This piece of electronic equipment is installed in the ignition system and consists of an ignition coil controlled by the vehicle's main computer. Their main job is to increase and accumulate the required energy, and once completed, release the voltage through the spark plug cable. When the energy reaches the spark plug, the combustion process begins.
  Signs of a bad ignition coil:
  There are many signs that can alert you to problems with the coil.
  There are a few steps you can take to find out if the problem is with the ignition coil, coil assembly, or other components of the car. First test the coil with a multimeter. The ignition coil obtains energy from the battery, which is usually at least 12 volts. The coil then converts the energy to a higher voltage, at least 50,000 volts, to generate a spark. Then the energy is transferred to the spark plug through the distributor, and then the fuel is ignited. Some vehicles have only a few ignition coils to power the spark plugs, while other models use one ignition coil per plug. You must remove all the coils, and then have a multimeter and tool kit on hand.
  Is your vehicle counterproductive? If it is, you will definitely notice that it is happening. There will be loud sounds and vibrations to remind you that there is a problem with the car. There is a strong explosion, your car is leaning forward, and black smoke is coming out-it's hard to ignore these signs. The inspection lights may turn on, and you can smell the gasoline leaking from the car. These problems are also caused by low fuel pressure, but in most cases, the ignition coil failure affects the ignition time of the spark plug, resulting in misfire and incorrect timing.
  Engine stall
  Will your engine suddenly stop and start for no reason? If this happens, driving will become very annoying and frustrating, and it will also endanger your safety on the road. If one or more of the ignition coils under the hood starts to malfunction, this may cause the car to stall. The Te coil will produce irregular sparks, which will send an uneven charge to the spark plug. It will prevent the engine from running normally. If the vehicle has a per-plug system instead of a wasteful spark system, the ignition coil can cause serious problems. If some ignition coils fail, the car can still run, but it is not easy or smooth to start.
  Poor fuel economy
  If the ignition coil cannot transmit enough energy to the spark plug, the vehicle must burn and use additional fuel. This is the only way for the vehicle to keep running. But burning extra and residual fuel will reduce fuel consumption and fuel economy! Before taking a short test drive, make sure you understand the number of miles per gallon that a car can typically travel. If you don’t know the number of miles per gallon, check the odometer on the dashboard and calculate the number of miles you have driven and the average number of miles per gallon you normally receive.
  Occasionally idling
  If the car is idling unexpectedly, it may mean that your ignition coil or coil assembly is faulty. In addition, the power of the car is low when it is running, which clearly indicates that there is a problem with the ignition system.